Tag Importing Issue

Hello! I've been using MP3TAG for a while, but sometimes I got problems when trying to import tags... I've tried wih the CSV and txt files and I couldn't get anything. All the MP3's still have the same name and I need only the import the tags that were deleted after a kbps conversion. How could I do that? I've tried with the CSV just how it's: %Title%;%Artist%;%Album%;%Track%;%Year%;%Length%;%Size%;%Last Modified%;%Path%;%Filename%; but I couldn't reach anything. What am I doing wrong? Thanks.

I am not sure whether these tags can really be imported as they are information tags only - and therefore cannot be overwritten by an import.
Also I think that the proper names are %_path% and %_filename%