Thanks for your reply Sergey I was able to fix it with this:

http://support.microsoft.com/kb/289573/

The problem was with the server alias.

Enmanuel


>>I've installed MSDE SP3 on a client's network but have been unable to connect from the workstations. All PCs (4) are running Win XP Pro SP2. I've tried enabling TCP/IP and named pipes protocols and also adding \Program Files\Microsoft SQL Server\MSSQL\Binn\Sqlsvr.exe to the windows firewall exeptions (According to an article found on MSDN). I even set MSDE to use Port 1434 and opening that port on windows firewall but all to no avail.
>>
>>What can be happening? My only bet now is a bad windows installation or network configuration.
>
>Check mskb #827204 and mskb #841249