Problem with camera data capture

I have Winform with various objects on it (pictureBox, text boxes, labels...) and I have continuous drawing on my picture Box object.
I have added another picture Box object that accepts the image from web cam. And this is where my problem starts. It becomes white after 1-2 seconds. And what puzzles me is that same code for taking the video from web cam and putting it on picture Box works on another project (demo one) where I have only this picture Box on the form (in addition to combo box and button).
What might cause problem? Multithreading?
I'm kinda lost. Does anyone have an advice?
Regards
I have added another picture Box object that accepts the image from web cam. And this is where my problem starts. It becomes white after 1-2 seconds. And what puzzles me is that same code for taking the video from web cam and putting it on picture Box works on another project (demo one) where I have only this picture Box on the form (in addition to combo box and button).
What might cause problem? Multithreading?
I'm kinda lost. Does anyone have an advice?
Regards