VPN Client Issues

Hi,
Im trying to connect a win vista ultimate with a winxp machine through IPSec tunnel using Draytek vpn smart client but I get error message "a device attached to system is not functioning" with no err number when trying to connect to share folder with \\x.x.x.x\share.
The vpn works fine when trying from a virtual machine with winXP in the vista pc.
The vista pc has two network cards and kaspersky internet security. (I tried with both firewall off and nothing)
Any suggestions?

Hi!!! I found something that applies to to a Vista Ultimate 86 or 64 bit "Hot Fix KB933664" It pertains to the error message you are getting -a device attached to system is not functioning. Be very careful before applying it. Sincerely, Celestra