Perhaps you need to add bribes to your repo list.

You can check by running (from the command prompt -- forgive my mentioning the obvious if it's unnecessary): ppm repo list and if the response doesn't include bribes, add it with:

  ppm repo add *url* [ *name* ] [ --username *user* [ --password *pass
+word* ]
      Set up a new repository for PPM to fetch packages from.
[download]

You may also want to read ppm's help file ... and comprehensive (but long) explanation of the many options available when running ppm from the CLI.