I have just got this message too, first time i have received it. I hadn't downloaded the new version of limewire. I have just upgraded to the pro version been meaning to do it for awhile but this made me do it but I am still getting it.

I have checked my windows firewall and added limewire as a program to allow and it is granted all acces within my mcafee. Nothing should be stopping it so what is happening??? please help!