You may want to disable auto-tuning. this how to may help. Please post back
with the result.
How to disable Auto-tuning on Windows Vista
http://www.howtonetworking.com/vista/vistaipconfig.htm
--
Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on
http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on
http://www.HowToNetworking.com
"Tom Reis" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed)...
>I am having a issue with Windows Vista mapping a drive on Windows 2003 64
>bit. When using a mapped drive the response is very slow and seems to
>timeout. Mapping a drive in Windows XP works fine. Any ideas.
>