VirtualDub2 - can't join 2 videos with stream copy

[SmurfRecorder]

I don't know why but videos join correctly in Avidemux. While in VirtualDub2 I get error after file->save video

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VirtualDub Error
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Direct stream copy cannot be used with this video stream.
You may want to select different Input Driver.
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OK   
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And after File->Export->stream copy only first appended file is saved...

[epikuron]

In VirtualDub2 I get error after file->save video and after File->Export->stream copy only first appended file is saved too. Please, help me too!

[hello_hello]

It's probably because one of the videos is being decoded with the ffmpeg input driver, which decodes the video to a raw format, and therefore direct stream copy can't be used.

Maybe post the details of each video. You can get that info with MediaInfo.