Ouch sorry it seems Dunlop0078 misread the IV as a V or otherwise mistaken your motherboard. The Crosshair IV is an AM3 motherboard and will only support AM3 processors. You would need the Crosshair V Formula or Crosshair V Formula Z to have any FX processor work.
You have a few choices and each requires you to sell some component.
1) Return/Sell your FX 8350 and get an Phenom II X6 (1100T,1090T, 1075T, 1065T, 1055T, 1045T)
2) Sell your Crosshair IV and Buy compatible AM3+ Motherboard for your FX 8350
3) Sell your Crosshair IV, FX 8350, your previous CPU and build an Intel PC