cant able to play mp3 file in NOKIA Phone

Hi frnds,
I have made an application to play an mp3 file for NOKIA N8-00. I have used Phonon multimedia toolkit. My player is running properly in simulator. But when I install the .sis file in the phone there after selecting the .mp3 file when I click the done button, it is not adding the file in the list and the program hang like when we minimize any application in desktop pc.

Again when I click the application it come in the page from where I have to select the .mp3 file from device. Means the prog running in background but can't able to add file.

I am new in Qt C++. Can anybody please help me.

Thanks in advance.