Same problem here!
I'm from Germany, too, and I used to own a TSU3000 and recently switched to a TSU7000. I had the same problem with both remotes - but oddly a buddy of mine has one of the very first Prontos (not NG, RU890 or something) - AND ON HIS REMOTE IT WORKS!!
I even tried learning the codes with his remote an then importing them into mine via ProntoEditNG - which did not work either!
The TSU7000 (and formerly the 3000 as well) does learn the codes all right, but seems to have problems reproducing them - the Pace receiver simply won't react!
I laready posted the problem to Philips (via www.pronto.philips.com) a few months ago, but no reaction so far...

Greets
Cyguy