VPN/domaine authentication on D610

Hi,

 

I'm having a Cisco pix 515 that allow vpn connexion on my domain. The PIX is configured to retrieve the login/password from our domain controller with Radius.

I've got many computers (Dell lnspiron, Latitude C6xx, and others brands) that get perfect acces thru this PIX:Once the connection established, i can access to anything (that the user has right to).

When I try with my first D610 (testing this model), i can pass thru my Pix, but after that, when i try to get access to any file on the network i get a message box that ask for a login/password. I type my login/password (same as the on to log on the computer) but i get a message that say "already tried this account..." so i can't get access to my files. If i use the login/password of another user, i get access to the files (with the restriction of this second account).

Since it works perfectly for the others computers, i think that it might come from the D610 but i can't find a solution. I've already reconfigured the D610 like any of my others computers (Windows XPSP2, same VPN settings...) but I still got that annoyance.

I would appreciate any help.

Thanks.