plz try this trick
Step1:While haveing a conversation with somone goto Start>Run and type in CMD and it should bring up dos
Step2:Now type in Netstat -n
Step3:Your dos should say this in this order Proto Local Address Foreign Address State
Step4:Look under foreign address and look for a ip that is on port 5101 so for example 126.0.0.1:5101 and thats theyr ip
enjoy ittt