AlJazeera Sports + Viewing Card?

Ok, I bought a one year subscription for AlJazeera Sports + today. I also bought a CAM because my reciver doesn't accept cards alone. I tried it at the place where I bought it (with out the CAM, because their reciver accepts cards alone) and it worked well. But at home it doesn't work on my Alfa Gold Digital AD-7000 2CI satellite reciver (yes, it is a bit old with two card slots and requires a CAM to use cards). When I insert the card, the card in light turns on and I get Key Fly v4.5 on the menu. But the JSC Sports + channels still say "Scrambled Channel". There are a couple of options but I don't know what to do. Can any body help me?