Hey there,
I use this fabulous plug in on a several number of blogs. But this time i'm having this trouble…
When I push the button at the wordpress editor, the following error message appears at the cforms little window.
Warning: require_once() [function.require-once]: open_basedir restriction in effect. File(/home/p50109/public_html/wp-blog-header.php) is not within the allowed path(s): (/home/dotabra/:/usr/lib/php:/usr/local/lib/php:/tmp) in /home/dotabra/public_html/wp-content/plugins/cforms/js/insertdialog25.php on line 11
Warning: require_once(/home/p50109/public_html/wp-blog-header.php) [function.require-once]: failed to open stream: Operation not permitted in /home/dotabra/public_html/wp-content/plugins/cforms/js/insertdialog25.php on line 11
Fatal error: require_once() [function.require]: Failed opening required '/home/p50109/public_html/wp-blog-header.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/dotabra/public_html/wp-content/plugins/cforms/js/insertdialog25.php on line 11
I've tried to delete the plug in and install again, but it didn't worked 
Please help me. I don't know nothing about php/ajax.
Thanx and sorry for the bad english. I'm rusted xD