i have lime wire pro 4.8.1 it was working great but after i reinstalled my system. the thing wont get connected

. did almost every thing firwall settings even tried with the port . and i havent installed third party security what could be the problem ? my operating system is xp sp 2 i tried the 4.12 basic and it gets connected.but i want my pro

i know its old but still its pro :P can ne one tell me wat is the problem. thak you