I have Limewire PRO installed on my laptop with VISTA as my operating system

not sure which version of Limewire PRO I have but I don't think it is the most current got it off of my old puter. My laptop now is 32bit, duo core, and I am running AVG virus protection. I have my firewall set to allow Limewire through but when I bring it up it says that there is still a firewall blocking the program??? I know VISTA is security happy so is there some other security feature I need to disable? Any help would be greatly appreciated.
Thanks,
Hovda