Falling Through The Frame!

I have a queen bed with a split box foundation. I am looking for a frame with hook-on rails for a head and foot board. I also need 3 "hook-in" type cross braces for head, center, and foot area. I am looking at the Deluxe Hospitality BedTM Bedrails and would like to know if this will work for me. The current frame I have includes 3 cross braces, but only one actually "locks" in to the side rails. the other two just fork between the side rail and can slide off the rail with body movement. Any comments would be great. -Erin