21507 Script Error - PHP/js/SQL/XML

I have n ecommerce script build in PHP/SQL/XML/Flash/Javascript and it works great on my server but when I move it to another server and try to use it, there are 2 issues that come up. ISSUE 1 When I got to the [login to view URL] page there is a "-1 " above the admin login box. Then when I try to put the password in and enter the admin area the "-1 " turns into: -1 Warning: Cannot modify header information - headers already sent by (output started at /home/articles/public_html/audio/[login to view URL]) in /home/articles/public_html/audio/[login to view URL] on line 29 Warning: Cannot modify header information - headers already sent by (output started at /home/articles/public_html/audio/[login to view URL]) in /home/articles/public_html/audio/[login to view URL] on line 31 ISSUE 2 Part of the script automatically delivers mp3 files after being purchased via paypal and a mp3 download link also sent to the users Email address. On this new server the mp3 link are not being added to the customer download area and the email is not being sent with the download links. It seems as though there is something different with the new server I'm trying to install on because I can install the script fine on multiple hosting accounts and domain within my own server but not on this new one. The script takes about 5 – 10 minutes to install. I will provide an installation instructions doc explaining how to set up the script. Below is info regarding the two servers. MY SERVER (works on this server) Operating system: Linux Apache Version: 1.3.33 (Unix) PERL version: 5.8.4 PHP version: 4.3.11 MySQL version: 4.0.25-standard OTHER SERVER (doesn't work) Operating system: Linux Apache version: 1.3.34 (Unix) PERL version: 5.8.7 PHP version: 4.4.2 MySQL version: 4.1.18-standard Hosting package: vodahost Thanks!