doesn't recognize .mp3

I installed libid3tag, libmad, libsndfile, zlib all from source without any problem before installing
moc from source, again without any problems.

Now when I start mocp it doesn't list .mp3 files in directories...
How can I make sure it compiles with mp3 and wav support ?

thanks,
noob

Does ./configure shows that mp3 pluginm will be build? It sould display something like that at the end:

Decoder plugins: mp3
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Damian Pietras - MOC developer