Capabilities problem

Hi,

Im doing guitar tuner which im trying to run on my N8. The program works fine on simulator, but when running it on N8 through Qt Creator I get following Application Output:
Code:

Installing application... Starting application... Application running with pid 25366. BRDBG:CapabilitiesCalledWhenNotInitialised
Application starts ok on my phone, but when I hit tune button, which starts reading microphone data, program will crash. After that Application Output looks following:
Code:

Deploying application to 'Nokia N8-00 USB (COM10)'... Copying installation file... Installing application... Starting application... Application running with pid 25242. BRDBG:CapabilitiesCalledWhenNotInitialised BRDBG:CapabilitiesCalledWhenNotInitialised Process 25242, thread 25243 stopped at 0x27170: A code abort exception has occurred. Finished.
In pro. file I have added UserEnvironment capability, which should be enough as far as I know.

Any ideas to fix this problem?