Hi,
I can only answer in english or german.
You can plug the Printer/Scanner at the Asus, printer will work fine I you set it up in that way. To get the scanner working, you need a scanner-server on your mashine. You can read about a scanner-server on asus-routers here. I did a little HowTo. Don't know if you are able to read it in german?
How is your router setup?
Which firmware do you use?
Regards
Oliver