I gathered that it could be because of vb4.0 (which I was using prior to this post) that caused the problems...so I installed vb3.84 to test.
When making the VB connection in Magento, I faced this error message:
http://domain/forums/aitmagentovb.php is not available or vBulletin is turned off by administrator
I have verified that aitmagentovb.php is in the forums directory and Vb is not turned off.
Any help would be appreciated.