Printing shows 404

Hi
Have installed a theme and recipe maker plugin. Recipe shows URL http://ny.madforsjov.dk/?p=89 and pressing Print shows URL http://ny.madforsjov.dk/wprm_print/88 and the error 404 not found.

Have tried to change theme and disabled all plugins exept WP Recipe Maker and the error remains.
How do I solve this

Regards
Peter

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