Problem with drag&drop in qlistview

[mambo]

Hi everybody,

I'm developping an application using QT3 and visual C++6.
One of my interfaces contains 2 qlistview objects where I can drag one element from the first and drop it in the second.
It worked fine until I added this line in my main function:

HRESULT	hr = CoInitializeEx(NULL,COINIT_MULTITHREADED );

HRESULT	hr = CoInitializeEx(NULL,COINIT_MULTITHREADED );

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What am I doing wrong?

Thanks for helping me.