Support system alpha problem.

Warning: Cannot modify header information - headers already sent by (output started at /hsphere/local/home/jeff/parentgallery.org/wp-admin/admin-header.php:110) in /hsphere/local/home/jeff/parentgallery.org/wp-includes/pluggable.php on line 890

I get the above error when selecting update after making changes to the imap settings. IMAP is not working.