QWSDisplay::Data::Init: Invalid argument

Rick
Friends,

I tried to compile GUI application with Qt Creator on Tiny6410 and got this
error :
=================
QWSDisplay::Data::Init: Invalid argument
Client can't attach to main ram memory. 
Aborted
===================

I tried to use this Qmake :
/usr/local/Trolltech/QtEmbedded-4.7.0-arm

and built example application :
 /usr/local/Trolltech/QtEmbedded-4.7.0-arm/examples/desktop

Is the application not compatible with Tiny6410, or I used a wrong compiler
?

Thanks