rsync - Nov 2006 - Rsync does not work with existing remote ssh tunnel

Hi folks,

I have the following problem.

I have installed 
1.) a rsync daemon on a windows machine under cygwin
2.) installed a tunnel via ssh from the remote machine to my pc
3.) I could run rsync from the remote machine to make bakups

On the remote machine and on my pc I have rsync version 2.6.6 
protocol version 29.

The network admins decided to make 2.) inpossible. So I build the 
ssh tunnel from the pc to the remote machine. But the backup does
not longer run.

I get now the error you can read in the subject. Any hint to get 
it run again would be fine.

Thank for any help 

 Franz

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