MF_E_UNSUPPORTED_BYTESTREAM_TYPE on calling MFCreateSourceReaderFromURL for a mp3 decoder

Hi,

I’m developing an mp3 decoder using Media Foundation API.

Everything works fine in my pc and on all the computers I’ve tested, except for a PC with Windows 7 Home Premium, where the api

    IMFSourceReader * pReader = NULL;
    HRESULT hrError = MFCreateSourceReaderFromURL(<file_to_decode.mp3>, 0, &pReader);

fails with error MF_E_UNSUPPORTED_BYTESTREAM_TYPE.

The mp3 file is the same for all tests.

Am I missing something? Any idea?