Changed comma to semicolon, and it works.
Only now i get "0-0 700" (the "700" is what i want).
It seems that when Uge1!D4 and Uge1!E4 is empty, it results in zeroes.
I would like, when Uge1!D4 and Uge1!E4 is empty, but Uge1!F4 is different from Rulleplan!D4, only the content of Uge1!F4 is entered in the targetcell.