[PyQt] Windows-problem with QLocalServer/QLocalSocket

[T.N.T.]

Hello

This is probably rather a windows-problem so I hope it is not too off-topic.

I'm experimenting with a little PyQt-app where one instance connects and 
writes as client to another instance. That works fine in Linux, Mac Os, 
and one Windows XP that I have tested. But on another box where a 
Windows 7 Home is running, it fails. It connects but but then the server 
part fails to read from the connection (waitForReadyRead() just 
immediately returns False).

Does my script need special permissions or something?

Thanks in advance for any answer, T.