One of the people in this thread http://forums.arcgis.com/threads/49819-HEC-GeoRAS-10-issues-with-ArcMap-10 mentioned having issues with geo-ras because he was using georas with a translated version of arc. Based on your screenshot I think you may be having the same issue. Not sure what it took for him to get arc into a different language, but its worth a shot if you are still having trouble.