MinGW-Port: Problems with UnoUrlResolver

Hello List,

I have a working Qt/C++ application connecting to the office using 
::cppu::bootstrap().

After porting this application to MinGW, I got a BootstrapException saying 
"unexpected UNO exception caught: component context fails to supply service 
com.sun.star.bridge.UnoUrlResolver of type 
com.sun.star.bridge.XUnoUrlResolver".

Going down to the basics I compiled the example office_connect.cxx under MinGW 
and got the error message "Couldn't instantiate 
com.sun.star.bridge.UnoUrlResolver service".

I have the feeling that some information is missing, but I don't know how to 
submit it. All environmental variables known to me don't help. Is there 
anybody who can give me a hint what I should do?

I'm using the MinGW-LibreOffice from the daily-build-service (2012-02-20); the 
MinGW itself is the cross tool chain from SuSE 12.1.

Thanks,
Helmar