Cannot use patch for Anno 1503

Hello!

I've successfully made a backup of my anno 1503 (german) with blindwrite and the bwa-file. Now I want to use the patch 1.02 from the anno support website. I installed the patch without any problem. But when I want to start playing anno, it failed with an error in the 1503startup-exe.

Does anybody else here made experiences with a backup of an securom new protected game and updating it?

Thanks for any kind of help.
 
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