It sounds like you may need to flip your axles to raise the trailer. Look under the trailer and see if the axles sit on top of the springs or under them. If on top the axles can be moved to the bottom and raise the trailer. Mine came from the factory this way already so I didn't have the problem.
2006 GMC 2500HD CCSB 4x4 Duramax/Allison, Titan 52 gallon fuel tank, Prodigy Controller, B&W Companion Hitch
2010 Jayco Designer 35RLTS, Cummins/Onan RV QG 5500 EVAP, Progressive Industries EMS-PT50C, TST Systems 507 TPMS, RV Flex Armor Roof