Why isn't my Ares 2.0.9 working?

I have Ares 2.0.9 installed in my laptop which has windows vista home premium..ares is a p2p program like limewire!..i have the same version of ares installed in my computer which has windows XP n its all fine working. But the same program is not working on my laptop..why??..please give me some suggestion what should i do. I can download easily everything on my computer but not from my laptop..!!..Help me..!