Got it fixed, here's the reply i got on the macromedia forums which did the job!
I'm not very familar with PHP, but try removing the parameter at the end of the form "action" attribute. Change this
<form name="form1" method="post" action="reactform.php?select=">
...to ...
<form name="form1" method="post" action="reactform.php">
The select list value should be passed as a FORM variable. If you want a URL variable, use method GET instead of POST. Also, you may want to change the name of the select list to something other than "select". This is a reserved word in some cases and can cause problems.
Hope that helps others.