little help with the RTE page

when i go to the RTE page (777) when programing my dep and arival airports i hit the Route Request button to choose the route that i want to fly. however when i try to choose the next page of routes (i have built a lot of of routes with FSbuild) by hitting the NEXT PAGE button, i go back to the RTE page. how can i view the next 4 pages of routes. for example, i was trying to program a flight from boston to miami, however i have 5 pages of routes to choose from when departing from boston but i could not get past the first page. if anyone could help me out here, it would really help me out big time!!!!thanks!!!!!!!!anthony miller