Windows 7 and Vista can't connect to server 2008

[Shearer12]

Hi people,
im having a problem with two of my computers connecting to server 2008, im running Windows 7 Professional, Vista Ultimate and XP Pro.
All computers are on the same network and can identify each other, just 7 and Vista cant connect to the server, XP connects fine.
if anyone could help me with this problem i'd appreciate it.
thanks

 

[kegobeer]

Joining a domain should be the exact same process for Vista and 7, as it is for XP. What have you tried, and what error are you getting?

 

[Shearer12]

Yeah I have followed all the right steps to join a domain, its just that 7 and Vista say that they are unable to connect to the domain that i have established, im not sure of the exact text of the error. But i know it exists because they can identify it just not connect to it.

 

[kegobeer]

If you could post the exact error message, it would be most appreciated.