Agp card does not work on my pc but works on other PCs.?

My Agp graphics card is not working with my pc, it isnt even getting power from the motherboard i guess, cuz i checked the gpu fan with a pen and it wasnt moving. I tried to check this Agp card on other systems and it worked on every system. Now from all this it comes to mind that the agp slot on my motherboard is damaged. but the thing is that i checked a different agp card on my pc and it worked. the situation is My agp card doesnt work on my system but works on other's. My agp slot accepts other agp cards but doesnt accept my agp card. what should i do?