rdesktop freezes after few seconds

Hello,
 
I connect from home via a VPN to my office PC. The office PC is a Win7
system.
When I use rdesktop  most of the times after between few seconds and two
minutes rdekstop freezes.
Ping to my machine works so it should not be the vpn.

I use rdesktop 1.8.1 on openSuSE 13.1.

Whe I connect from a windows PC with mstsc I have no problem.

Is there a way to log rdesktop to find the reason of the freeze ?

Thanks
Andreas
 

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