install qt app on intel/ power pc

Hello,

I have the Qt app developed on Mac (Intel). But now I want the app to run on power pcs too. So i added the following lines to my .pro file and ran the qmake again.
Code:

QMAKE_MAC_SDK=/Developer/SDKs/MacOSX10.4u.sdk CONFIG+=x86 ppc
I copied over the compiled app binary to and ran it on the Mac (power pc) the app initially shows up in the notification panel as if its going to run but then it just disappears. I tried opening the app from terminal to see what is going wrong with no luck.

Any insights that can help me resolve the problem would be greatly appreciated.

thanks in advance,