Thank you very much for the promt reply :)

I acually selected "34R" in the ARR section of the DEP/ARR page, not ILS34R. And by selecting just 34R, the ILS frequency did not change to 110.3, but remained at the frequency it had before. Thus I dialed it manually ( not in the VOR radios). However, I did not check the NAV/RAD page :-/
So, in the ARR airports with an ILSxxx option, you should select this as the arrival? Or at least make sure it is in the NAV/RAD page afterwards?

BR,
Anders