Lansweeper stopped scan machines

[Aranel]

Hi all.
Lansweeper stopped scan machines.

Lansweeper service 4.2.0.86 

 Freeware version - Active scanning enabled

 Total computers scanned: 1 
LsPush queue: 0		
Computer queue: 0	Scans running: 0	IP scanning queue: 0
 IP scans running: 0

In "Last scanned" only PC with Lansweeper service.
In "System scanning log" nothing strange:

Info 	 Started v4.2.0.86 by NT AUTHORITY\система, port 9524, 10 Threads, 4 IP Threads, Freeware version 	 casull 	 8/21/2012 10:14:31 AM 
	 Info 	 Stopping service 	 casull 	 8/21/2012 10:14:05 AM

testconnection:

DNS test
-----------------------------------------------
Is this the correct remote IP: 192.168.0.67
If not, please check for DNS problems

Is this the correct computer name: BUH1
If not, please check for DNS problems

Remote WMI test
-----------------------------------------------
Found: Microsoft Windows XP Professional Service Pack 3
\root\cimv2 Remote WMI access test OK

Remote Registry test using WMI
-----------------------------------------------
Found: Microsoft Windows XP Service Pack 3
\root\default Remote WMI access test OK

Nothing has changed since 13/06/2012, when was the last succesful scan.
What's wrong?

[Hemoco]

The freeware version only support scanning with lsclient.exe. do you use this?