My suggestion would be to turn off vbseo
and remove or rename htaccess files your using on the server since everything seems to go to your forum instead of actually performing its normal actions like you see on my normal site.
Make sure the only thing active on your site is the default vb
forum and the ONLY plugin that is active is vbGallery and lets see where you are at.
You can verify that if you try my default test setup that things do work correctly and I am using the default released code you download.