Just my 2 cents! .... also make sure any firewall software like norton internet security, norton firewall, blackice defender etc have been properly configured to allow the internal ip.
I've had issues with that before, and lo and behold it was norton internet security.
Last but not the least make sure your on the same workgroup on all the computers/laptops.
HTH
A smart person knows what to say, but a wise person knows whether or not to say it.
'When perfection comes, the imperfect disappear.'
