problem with Qbluetooth :(

[ahmed ali]

thanks, but,
I have tried all guesses but the same error

[ChrisW67]

You do have Qt Mobility installed, don't you?
Have you added the necessary references to Qt Mobility into your pro file?
Can you build the examples that come with Qt Mobility?
Do the headers in you source look like those in the examples? There is no "QBluetooth" or "Qbluetooth" in my copy of the source or examples.