Can anyone that has experience working on car A/C systems, give me a little help?

I am having trouble with a 2008 Hyundai Santa Fe taking a R134a charge after repair. I had the system professionally evacuated, changed the expansion valve and drier. Put the system on vacuum, and it held vacuum. Went to recharge with freon, and the system would not take any freon. Had the ac on full blast cold, and jumped the clutch relay (got the click), still would not take any freon, and the system is reading empty. Not sure where to go from here. Any help would be appreciated.