Cannot login to vista using domain account

I have a complicated issue that I hope someone can help me with. Basically I
cannot seem to login using my domain account (Windows 2003 domain) when on
any Vista machine (both pre and post SP1).

I can login fine to any XP machine on the network along with the 2003
servers we have. When I type in my username and password in Vista I get the
message "The username or password is incorrect". I have got a fellow Domain
Admin to log into the exact same machines and he can with no issues.

We use smartcard's with and MS PKI solution to login in the laptops. I can
going to my laptop using my smartcard fine, just not when I try to type in my
username and password.

I have looked at my account in AD and it seems fine. Does anyone have any
ideas what I can try or look for? I have had this issue since we first tried
Vista, but I kinda ignored it as I could login my laptop using my smartcard.
But I just got a new desktop (Dell Precision Quad core with 4GB RAM and Vista
Business 64bit) and I can't log in now on it!

Did you remember to login using the format domainname\username then
password?

yep and I tried using my cwestwater@domain.local - no joy

Is there anything in the event logs on the Vista computer or the domain
controller when the logon fails?

Hi Kerry, the logs are clear on both the vista box and the DC.

Nothing in the Security log on the server?