Undefined index: profile_id

Hi,i relay don't understant what its the problem with my vqmod.. last time its be alright but the error has coming in this 3 pass 3 days..see on below:

Notice: Undefined index: profile_id in /home/imbeauty/public_html/admin/model/catalog/product.php on line 268Warning: Cannot modify header information - headers already sent by (output started at /home/imbeauty/public_html/admin/index.php:85) in /home/imbeauty/public_html/vqmod/vqcache/vq2-system_engine_controller.php on line 28Warning: Cannot modify header information - headers already sent by (output started at /home/imbeauty/public_html/admin/index.php:85) in /home/imbeauty/public_html/vqmod/vqcache/vq2-system_engine_controller.php on line 29

This error will made after clicking the "save" on product.. hopefully any one can help me out..

Tanks in advance..

This isn't a vQmod error. The error is the first line: It means you are either using a 1.5.5.1 theme that you didn't upgrade when you upgraded to 1.5.6.1 as there is a new profile_id value that gets sent now.
OR
You didn't update all the new files when you upgraded
OR
You have vQmods that don't have the 1.5.6 updates for profile_id.

Tanks for you reply and help.. i have do all of them but i have removed the vqmod from my root and now i have this problem:

Notice: Undefined index: profile_id in /home/imbeauty/public_html/admin/model/catalog/product.php on line 268Warning: Cannot modify header information - headers already sent by (output started at /home/imbeauty/public_html/admin/index.php:81) in /home/imbeauty/public_html/system/engine/controller.php on line 28Warning: Cannot modify header information - headers already sent by (output started at /home/imbeauty/public_html/admin/index.php:81) in /home/imbeauty/public_html/system/engine/controller.php on line 29

Do you know what is wrong in that?..