Video not playing in ios4?

I am playing an video from url using MPMoviePlayerViewController class and it is working fine in all version of 3.(3.0,3.1,3.1.2,3.1.3)but in iOS4 video is not play开发者_如何转开发ing ? Have any one track this issue ?

thanks

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After struggling 3 to 4 hrs. i Found out the solution of the issue. Here is the solution:

MPMoviePlayerViewController *mpViewController = [[MPMoviePlayerViewController alloc] initWithContentURL:videoUrl];

[self presentMoviePlayerViewControllerAnimated:mpViewController];

[mpViewController.view setCenter:yourView.center];
[mpViewController release];

Cheers !!!!