"No decoder plugins have been loaded!"

Hey everyone!
I get this error:
$ mocp

FATAL_ERROR: No decoder plugins have been loaded!

I read the manual page and decided to use -D to find out where is the error:
$ mocp -D
Loading plugins from /usr/local/lib/moc/decoder_plugins...

FATAL_ERROR: No decoder plugins have been loaded!

There really is NO decoder plugins in /usr/local/lib/moc/decoder_plugins
But there ARE in /usr/lib/moc/decoder_plugins

I couldn't fix the path error by myself, for I do not know much and couldn't find where it is defined, Could you help me?

There's one thing - I've

There's one thing - I've installed moc from the repository. I have Ubuntu Studio 8.04.
I'll solve the problem by installing moc from source.

Problems

I am having the same problem.
I am trying to compile and install the alpha.2.5.0 version of moc and although everything is done ok, when i run the mocp i get this error prompt.
Does anyone knows how to install the decoder plugins needed by moc in order to function properly?