plzz help me....

i am a bsnl bb user(500 plan)i recently port forwarded the modem..now my problem is that while connecting to the net if i click the browser(firefox,opera and even for the utorrent application) it takes hell lot of time to get opened...
does nybody had the same experience??
if we open the browser bfore connectin to the net then no problem..
plz help me with ur suggestions...
tnx in advance..!!!!!

well that has nothing to do with port forwarding. could be a virus trying to communicate when you open your browser..scan for virus and also spyware