Nokia 6120

My softwareupdater will not reflash after changing the language.

I had UAE language 0552780 and changed to Euro1 0546326 for german.

But the original UAE firmware is 3.83 and the Euro1 firmware from the Nokia website is "only" 3.70 ?

How could i "force" the softwareupdater to reflash it?
Or what can i do?

Thanks