I posted something that might be relevant in this thread
http://www.pprune.org/forums/showthr...threadid=33461
Since then I have updated my network and fitted a new processor & motherboard and the problem arose again!
I dthe same, then had a brainwave - I removed any TCP/IP (except TCP/IP-> dialup adapter) from my network settings in Control Panel and it seems to work.
This MIGHT help.
Good luck