This is what I did, but is giving me an error in the same point, exactly in the first conditional line if ($ene1t!=0) {$message .='(3-1-2004/10-1-2004)'}:
<td colspan='2'><img src='http://www.costa4seasons.com/images/1nada.gif' width='50' height='9'><font face='Verdana, Arial, Helvetica, sans-serif' size='1'><b>Total
semanas: ".$numsemanas
." Apartamento: ".$Ref ." Calle: ".$direccion."</b></font></td>
</tr>
<tr>
<td height='19' colspan='2'><img src='http://www.costa4seasons.com/images/1nada.gif' width='50' height='9'><font face='Verdana, Arial, Helvetica, sans-serif' size='1'><b>Periodo:
;"
if ($ene1t!=0) {$message .='(3-1-2004/10-1-2004)'}
if ($ene2t!=0) {$message .='(10-1-2004/17-1-2004)'}
if ($ene3t!=0) {$message .='(17-1-2004/24-1-2004)'}
if ($ene4t!=0) {$message .='(24-1-2004/31-1-2004)'}
if ($ene5t!=0) {$message .='(31-1-2004/7-2-2004)'}
if ($feb1t!=0) {$message .='(7-2-2004/14-2-2004)'}
if ($feb2t!=0) {$message .='(14-2-2004/21-2-2004)'}
if ($feb3t!=0) {$message .='(21-2-2004/28-2-2004)'}
if ($feb4t!=0) {$message .='(28-2-2004/6-3-2004)'}
if ($mar1t!=0) {$message .='(6-3-2004/13-3-2004)'}
if ($mar2t!=0) {$message .='(13-3-2004/20-3-2004)'}
if ($mar3t!=0) {$message .='(20-3-2004/27-3-2004)'}
if ($mar4t!=0) {$message .='(27-3-2004/3-4-2004)'}
if ($abr1t!=0) {$message .='(3-4-2004/10-4-2004)'}
if ($abr2t!=0) {$message .='(10-4-2004/17-4-2004)'}
if ($abr3t!=0) {$message .='(17-4-2004/24-4-2004)'}
if ($abr4t!=0) {$message .='(24-4-2004/1-5-2004)'}
if ($may1t!=0) {$message .='(1-5-2004/8-5-2004)'}
if ($may2t!=0) {$message .='(8-5-2004/15-5-2004)'}
if ($may3t!=0) {$message .='(15-5-2004/22-5-2004)'}
if ($may4t!=0) {$message .='(22-5-2004/29-5-2004)'}
if ($may5t!=0) {$message .='(29-5-2004/5-6-2004)'}
if ($jun1t!=0) {$message .='(5-6-2004/12-6-2004)'}
if ($jun2t!=0) {$message .='(12-6-2004/19-6-2004)'}
if ($jun3t!=0) {$message .='(19-6-2004/26-6-2004)'}
if ($jun4t!=0) {$message .='(26-6-2004/3-7-2004)'}
if ($jul1t!=0) {$message .='(3-7-2004/10-7-2004)'}
if ($jul2t!=0) {$message .='(10-7-2004/17-7-2004)'}
if ($jul3t!=0) {$message .='(17-7-2004/24-7-2004)'}
if ($jul4t!=0) {$message .='(24-7-2004/31-7-2004)'}
if ($jul5t!=0) {$message .='(31-7-2004/7-8-2004)'}
if ($ago1t!=0) {$message .='(7-8-2004/14-8-2004)'}
if ($ago2t!=0) {$message .='(14-8-2004/21-8-2004)'}
if ($ago3t!=0) {$message .='(21-8-2004/28-8-2004)'}
if ($ago4t!=0) {$message .='(28-8-2004/4-9-2004)'}
if ($sep1t!=0) {$message .='(4-9-2004/11-9-2004)'}
if ($sep2t!=0) {$message .='(11-9-2004/18-9-2004)'}
if ($sep3t!=0) {$message .='(18-9-2004/25-9-2004)'}
if ($sep4t!=0) {$message .='(25-9-2004/2-10-2004)'}
if ($oct1t!=0) {$message .='(2-10-2004/9-10-2004)'}
if ($oct2t!=0) {$message .='(9-10-2004/16-10-2004)'}
if ($oct3t!=0) {$message .='(16-10-2004/23-10-2004)'}
if ($oct4t!=0) {$message .='(23-10-2004/30-10-2004)'}
if ($oct5t!=0) {$message .='(30-10-2004/6-11-2004)'}
if ($nov1t!=0) {$message .='(6-11-2004/13-11-2004)'}
if ($nov2t!=0) {$message .='(13-11-2004/20-11-2004)'}
if ($nov3t!=0) {$message .='(20-11-2004/27-11-2004)'}
if ($nov4t!=0) {$message .='(27-11-2004/4-12-2004)'}
if ($dic1t!=0) {$message .='(4-12-2004/11-12-2004)'}
if ($dic2t!=0) {$message .='(11-12-2004/18-12-2004)'}
if ($dic3t!=0) {$message .='(18-12-2004/25-12-2005)'}
if ($dic4t!=0) {$message .='(25-12-2004/1-1-2005)'}
;
$message .="
</b></font></td>
</tr>
<tr>
<td height='19' colspan='2'> <div align='right'>
<table width='0%' border='0' cellspacing='0' cellpadding='0'>
<tr>
<td>+<img src='http://www.costa4seasons.com/images/1nada.gif' width='50' height='9'></td>
<td> <font size='1' face='Verdana, Arial, Helvetica, sans-serif'>
";
if ($ene1t!=0){ $message .= $ene1t. ' € <br>'}
if ($ene2t!=0){$message .=ene2t. ' € <br>'}
if ($ene3t!=0){$message .=ene3t. ' € <br>'}
if ($ene4t!=0){$message .=ene4t. ' € <br>'}
if ($ene5t!=0){$message .=ene5t. ' € <br>'}
if ($feb1t!=0){$message .=feb1t. ' € <br>'}
if ($feb2t!=0){$message .=feb2t. ' € <br>'}
if ($feb3t!=0){$message .=feb3t. ' € <br>'}
if ($feb4t!=0){$message .=feb4t. ' € <br>'}
if ($feb5t!=0){$message .=feb5t. ' € <br>'}
if ($mar1t!=0){$message .=mar1t. ' € <br>'}
if ($mar2t!=0){$message .=mar2t. ' € <br>'}
if ($mar3t!=0){$message .=mar3t. ' € <br>'}
if ($mar4t!=0){$message .=mar4t. ' € <br>'}
if ($mar5t!=0){$message .=mar5t. ' € <br>'}
if ($abr1t!=0){$message .=abr1t. ' € <br>'}
if ($abr2t!=0){$message .=abr2t. ' € <br>'}
if ($abr3t!=0){$message .=abr3t. ' € <br>'}
if ($abr4t!=0){$message .=abr4t. ' € <br>'}
if ($abr5t!=0){$message .=abr5t. ' € <br>'}
if ($may1t!=0){$message .=may1t. ' € <br>'}
if ($may2t!=0){$message .=may2t. ' € <br>'}
if ($may3t!=0){$message .=may3t. ' € <br>'}
if ($may4t!=0){$message .=may4t. ' € <br>'}
if ($may5t!=0){$message .=may5t. ' € <br>'}
if ($jun1t!=0){$message .=jun1t. ' € <br>'}
if ($jun2t!=0){$message .=jun2t. ' € <br>'}
if ($jun3t!=0){$message .=jun3t. ' € <br>'}
if ($jun4t!=0){$message .=jun4t. ' € <br>'}
if ($jun5t!=0){$message .=jun5t. ' € <br>'}
if ($jul1t!=0){$message .=jul1t. ' € <br>'}
if ($jul2t!=0){$message .=jul2t. ' € <br>'}
if ($jul3t!=0){$message .=jul3t. ' € <br>'}
if ($jul4t!=0){$message .=jul4t. ' € <br>'}
if ($jul5t!=0){$message .=jul5t. ' € <br>'}
if ($ago1t!=0){$message .=ago1t. ' € <br>'}
if ($ago2t!=0){$message .=ago2t. ' € <br>'}
if ($ago3t!=0){$message .=ago3t. ' € <br>'}
if ($ago4t!=0){$message .=ago4t. ' € <br>'}
if ($ago5t!=0){$message .=ago5t. ' € <br>'}
if ($sep1t!=0){$message .=sep1t. ' € <br>'}
if ($sep2t!=0){$message .=sep2t. ' € <br>'}
if ($sep3t!=0){$message .=sep3t. ' € <br>'}
if ($sep4t!=0){$message .=sep4t. ' € <br>'}
if ($sep5t!=0){$message .=sep5t. ' € <br>'}
if ($oct1t!=0){$message .=oct1t. ' € <br>'}
if ($oct2t!=0){$message .=oct2t. ' € <br>'}
if ($oct3t!=0){$message .=oct3t. ' € <br>'}
if ($oct4t!=0){$message .=oct4t. ' € <br>'}
if ($oct5t!=0){$message .=oct5t. ' € <br>'}
if ($nov1t!=0){$message .=nov1t. ' € <br>'}
if ($nov2t!=0){$message .=nov2t. ' € <br>'}
if ($nov3t!=0){$message .=nov3t. ' € <br>'}
if ($nov4t!=0){$message .=nov4t. ' € <br>'}
if ($nov5t!=0){$message .=nov5t. ' € <br>'}
if ($dic1t!=0){$message .=dic1t. ' € <br>'}
if ($dic2t!=0){$message .=dic2t. ' € <br>'}
if ($dic3t!=0){$message .=dic3t. ' € <br>'}
if ($dic4t!=0){$message .=dic4t. ' € <br>'}
if ($dic5t!=0){$message .=dic5t. ' € <br>'}
;"
$message .="
</font> </td>
<td>  </td>
</tr>
</table>
</div></td>
</tr>
<tr>
<td colspan='2'><div align='right'><img src='../images/barra.jpg' width='100' height='1'></div></td>
</tr>
<tr>
<td colspan='2'><div align='right'>
<table width='100%' border='0' cellspacing='0' cellpadding='0'>
<tr>
<td width='32%'><table width='98%' border='0' cellpadding='0' cellspacing='0'>
<tr>
<td><img src='http://www.costa4seasons.com/images/costafourseasons.gif' width='110' height='55' align='top'></td>
<td><img src='http://www.costa4seasons.com/images/sgr.gif' width='45' height='55'></td>
</tr>
</table></td>
<td width='68%'><table width='100%' border='0' align='right' cellpadding='0' cellspacing='0'>
<tr>