Ah - Ok.
Tried
pacomp -a -r -sep \testing\ignore.zip "\testing\*.jpg"
Almost works for me (OK in the target folder: testing) I also get the file by file output listing.; so I cannot explain the no messages as you report.
But the subfolder recursion doesn't work
Note 1: which drive:folder are you running the command from - pacomp needs target info from the archive name; with your example would be in "current" folder.
Note: Cannot test with different drives, on this PC sorry.
Edit - just had a thought - if recursion is not working, then there may be no messages if your Backups\databases folder has NO .BAK files to compress.