Most or all of the Blaupunkt remotes use an incompatible carrier frequency. You should have done a quick BBS search before buying it. This thread documents other problems with people trying to use Blau remotes, for instance.

A good substitute would be the Pioneer CD-SR77 or CD-SR80. I use the SR77 with excellent results. Others are happy with the Kenwood steering wheel remote (not sure of the model number.)