QUOTE(Helmut @ 15.05.2009 09:56)

Try to run klnagchk.exe on the client.
Here's what I get:
Starting utility 'klnagchk'...
Checking command line options...OK
Initializing basic libraries...OK
Current host is ** withheld\withheld
Reading the settings...OK
Settings verification...OK
Network Agent settings:
Administration Server address: '** withheld** '
Use SSL connection: 1
Numbers of the Administration server SSL ports: '13000'
Numbers of the Administration server ports: '14000'
Administration Server certificate: available
Use proxy server: 0
Open UDP port: 1
Numbers of UDP ports: '15000'
Synchronization period, min.: 15
Connection timeout, sec.: 30
Send/receive timeout, sec.: 180
Attempt to connect to the Administration server...OK
Attempt to connect to the Network Agent...OK
Administration Agent is running
Receiving the Network Agent's statistical data...OK
Network Agent's statistical data:
Total number of synchronization requests: 2
The number of successful synchronization requests: 2
Total number of synchronizations: 2
The number of successful syncrhonizations: 2
Date/time of the last request for synchronization:5/15/2009 3:39:36 PM GMT (5/15/2009 10:39:36 AM)
Deinitializing basic libraries...OK