Using Qt with Symbian C++ together - or using Mobile Extensions

Hi!
I'm newbie in all the Qt stuff, and I'm quite confused.
I tried to use the mobile extensions inside my app, but it's not working. So I thought, maybe it's because QtCreator doesn't know to compile the native Symbian c++. Am I right?

Another Q:
So I tried to use instead in the Carbide C++, but everytime I build something, he says: "bldmake returned with exit value = 1", and: "BLDMAKE ERROR: Can't find "\Symbian\Carbide\workspace\*****\BLD.INF" "

Any help?...

Thanks,
Yair