latest version updatation problem

Hi,

I have updated custompress with the latest version but after that there is a problem "
Warning: Cannot modify header information - headers already sent by (output started at /home/jatinder/public_html/domain/wp-content/plugins/custompress/core/content-types.php:1186) in /home/jatinder/public_html/domain/wp-includes/pluggable.php on line 866"

Plz help if anybody knows.

Jatinder