unable to connect Tfs Server .

Question

TF31002: Unable to connect to this Team Foundation Server: 'Your TFS Server'.
Team Foundation Server Url: 'Your TFS Server URL'.

Possible reasons for failure include:
- The Team Foundation Server name, port number or protocol is incorrect.
- The Team Foundation Server is offline.
- Password is expired or incorrect.

Note :

I have installed VS 2005 in my system.