vista business login to sbs 2003 r2

>I have 2 vista business pc that are configured to login to a sbs2003 r2
>server.
> When they boot up and I get past the windows flag, they just say please
> wait
> and after i login, i wait even more. Any way to resolve this super slow
> login?
>
> Also on the vista pc is quickbooks 2007 pro and it cannot open up the
> company file on the server, i just get the blue circle spinning, no error
> or
> nothing. Qbooks works just fine on the xp pro sp2 pc.
>
> Any suggestions?
>
> Thank You
>
> Joe