I know you found your error, and it may well have been this, if not...
your LIKE statement is missing the first % sign:
No
<?
$result = mysql_query("SELECT id_nbcmdf,name,pol_num,ssn FROM nbpmdf WHERE $_GET[searchPar] LIKE '$_GET[searchstring]%' ORDER BY $_GET[searchPar]");
?>
But:
<?
$result = mysql_query("SELECT id_nbcmdf,name,pol_num,ssn FROM nbpmdf WHERE $_GET[searchPar] LIKE '%$_GET[searchstring]%' ORDER BY $_GET[searchPar]");
?>
Sorry if that was the same error that you had found