FastTemplate Sending headers

When i run my user login script i get the following errors: Warning: Cannot add header information - headers already sent by (output started at c:\web\fasttemplate\class.FastTemplate.php:333) in c:\web\re-write\login.php on line 38 Warning: Cannot add header information - headers already sent by (output started at c:\web\fasttemplate\class.FastTemplate.php:333) in c:\web\re-write\login.php on line 39 Warning: Cannot add header information - headers already sent by (output started at c:\web\fasttemplate\class.FastTemplate.php:333) in c:\web\re-write\login.php on line 42 Lines 38 and 39 set cookies, and line 42 sould send a http redirect. I know that i cannot send headers once they have already been sent. What i want to ask is does anyone know where fasttemplate sends the http headers, so i can paoosibly remove or modify this line in the class so that my script can send out headers. Thank you for any help