vb_session error message

My forums has been using vbseo for about 2 years without any problems until today im getting this error message:

Fatal error: Cannot use object of type vB_Session as array in /home/pearl/public_html/forums/showthread.php(1963) : eval()'d code on line 33

Any ideas what this means?

http://www.bluepearl-design.com/foru...tisements.html

Does this happen when vBSEO is disabled ?

I have just disabled the vbseo plugin, but its still rewriting my URL's :S

Did you disable it though the vbseocp.php setting or the admincp -> product manager?

Tried to disable it boths ways, first i disabled it via the plugin manager which didnt work, so i then decided to disable all hacks, but vbseo is still running..