problem loading xs

[Geoffrey Leach]

I'm attempting to diagnose a problem with Audio::TagLib, which is 
basically a collection of XS interfaces to the taglib library. The test 
script:
        use Audio::TagLib;
        $id3 = Audio::TagLib::FileRef->new( 't.mp3' );
fails with the message:
        Can't locate object method "new" via package 
"Audio::TagLib::FileRef" at MP3test.pl

I've stepped through XSLoader, and it appears to be working correctly.
The xs binary is installed:
        /usr/local/lib/perl5/site_perl/5.10.0/i386-linux-thread-multi/
auto/Audio/TagLib/TagLib.so
The .bs is there as well. It's empty. This appears to be correct.
nm TagLib.so finds T XS_TagLib__FileRef_new.

I'm using 5.10.0. The dist uses ExtUtils::MakeMaker, and that's up to 
date.

Any suggestions on how to diagnose the problem?

Thanks.