VPN TLS File server Access

[Guest]

I have Laptop computer, and his account is in domain. Domain is Windows 2000
native.
I have VPN(PPTP) access to my company. If I use Username & password I
connect successfully and I can access share drive on server.
But if I chose TLS authentication. I successfully connect to my company, but
I can not access share folder. Share folders, are Mydocument that I
synchronize with my laptop. I get pop up massage, to choose witch certificate
to use. I can not access any other share drive in any server in domain.
In both type of connections, I can access Exchange server with my outlook
2003 client.
VPN Server is based on isa 2004 server sp2

 

[Guest]

I find out what is the problem.

If I remove all map drives than I can access servers on network.
How can I go around these. I can not go around and instruct users, dismount
all map drives and offline files, or clear passwords in control panel and so
on….