cl_bds_document_set=>create_with_table docx and xlsx

Hello,

I use cl_bds_document_set=>create_with_table to put files from a server in the database but I can't add files of office 2007,

other files a doc, jpg, pdf are no problem.

The problem is that there is no mime type in table toadd of docx.

What can I do to add the right mime type?

Thanks