Remote desktop not working on Proliant ML310 G4 768

[Icharus]

Hello,
i'm having serious problem with my proliant ml310 G4 storage server, server is only used with remote desktop and has no display (normally).
I just reinstalled microsoft server 2003 SP2 and installed all updates and drivers from windows update / hp software disks.

When i try to connect from client machine to server, i get error message like "This computer can't connect to remote computer. The connection was lost due to a network error. Try connecting again....etc".
I get an error in server, event viewer message:

Product: Windows Operating System
Event ID: 50
Source: TermDD
Version: 5.2
Symbolic Name: STATUS_RDP_PROTOCOL_ERROR
Message: The RDP protocol component %2 detected an error in the protocol stream and has disconnected the client.

Explanation

This error can occur if a terminal server receives packets over a Remote Desktop Protocol (RDP) connection that it cannot process.


I've tryed several "solutions" to this problem, including:

http://support.microsoft.com/kb/323497/en-us
(I only have Certificate registery key, not those X509 Certificate and X509 Certificate, deleting Certificate value does not help)

http://support.microsoft.com/kb/811770/en-us

Reinstalled RPD, no help. Also tested without firewall, no help.

Also tested with another network card, no help.

I can ping,telnet and connect to server via hp server management, but not with remote desktop from vista/xp/7...

Any ideas what could i do next?