Download the stock Sprint 3.35 ROM from
http://www4.sprint.com/pcsbusiness/d...CS_AM_Ship.exe
You need the 3.35 radio in order to run the newer ROMs.
Put your phone in bootloader mode (hold down the power + camera buttons at the same time and then while holding them, hit the soft reset), connect your USB cable, and flash the ROM. Then reflash 5060.