Sleepless was refering to these details: System details - help us to help you (click on blue link)

Mcaffee .. firewall or just security programs? Only one active firewall needed & it needs to be configured to allow LW full access.

It's my guess the issue is with your modem/router or ISP. But it may be something as small as java version or corrupt installation.

BTW does your security package include Pestpatrol? If yes, put LW on it's exception list. Else it will attempt to remove the LW program ... it is not safe to use with p2p programs.