Can not establish a VPN Tunnel from behind a PIX 501

[ksaeed123]

I am trying to establish a vpn tunnel from windows 2003 server which is behind a PIX 501 without any success. I am able to establish a vpn session if the server is not behind a Pix 501.

Any Iseas why?

Thanks for any help.

[acomiskey]

What kind of vpn?

[ksaeed123]

I am trying to connect to Watchguard firebox X700 vpn from Windows server 2003 using windows vpn client.

[ksaeed123]

Trying to establish a vpn tunnel from a windows vpn client to a watchguard Firebox X700 VPN.

Thanks.