got a question for u coders

[chevy01xtreme]

i have vb 3.0.1 installed on my site and it seems members or i cant post 2 times in a row on my site.when you try and do this it posts it in the first post...i do have some hacks installed on my site...does anyone know what would cause this..if you register to my site u can check this for urself.i had
vbmechanic installed and designed my site and he doesn't know what is causing this.he said it might be vbulletin 3.0.1 but this problem started much after the upgrade to vb version 3.0.1.and he hasnt gotten back to me about so i ask any great coder out there do you have any idea what can cause this.cause i want it to stop


my site www.s-10owners.com join and see for urself what it does