Server 2008 TS - some client could not connect to the server

Hi guys,


I have a Server 2008 x64 Terminal Server with license server (some machine) and installed device CALs.

I can connect with Windows 7 client to Terminal Server by RDP (TS assign device CAL to every connected machine automatically) without problem, but I get this error message if I try connection with Motorola (Symbol) MC8080 mobile scanners:

"Because of a security error, the client could not connect to the remote computer.
Very that you are logged on the network, and then try connecting again."

I tried different settings by KB2477176 and activate/deactivate server, but it didn't solve the problem.

http://support.microsoft.com/kb/2477176/hu

(These scanners can connecto to another Terminal Server.)

Is it client or server-side issue?

Have you another idee?

Regards,

Gabor