Is this a valid route ?

Trying to use the UA award searching function for LAX=>FRA=>KIX=>HKG.
The site come back with:

"Error
! We were not able to find any available flights for award travel meeting your requirements. You may modify your search criteria or review the MileagePlus Travel Award Rules. If you need additional assistance, call 1-800-UNITED-1 (1-800-864-8331) within the U.S. or Canada; elsewhere contact your local United Reservations Office."


Thanks