The Casadesus: Viola Concerto in the Style of J.C. Bach is protected in both the USA and in the EU. It is free in Canada (since Casadesus died in 1947) but would be subject to a block here due to our headquarters being in the USA (though our server is in Canada). The work is not by J.C. Bach at all but was actually composed by Casadesus. Since we already have the file for the viola and piano arrangement, I deleted the copies you uploaded as they were duplicates.
Also, I changed the Creative Commons license to the non-commercial version for your own piece, as people are free to copy your work and sell it on E-Bay if you use the attribution (only) version. Carolus 05:29, 3 May 2010 (UTC) (IMSLP Copyright Admin)