light meter question

ok so i have a Nikon FM and the light meter is kinda acting weird so heres the problem

when i change the shutter speed the meter light moves up and down like it should but when i change the apriture opening it dosent effect the meter at all.

like when i move the shutter speed it will go from this
.+
o
-

to

+
.o
-
but if i change the apriture it dosent effect it so i dont know what is up with it

ok i found out what the problem is but i dont know how to fix it when i put the lens on the camera body the lense dosent catch the i dont know what its called umm the ring that turns rite behind the lense so ne ways when i cange the appriture the lense dosent connect to the ring so it wont turn when i change the appriture last night i took off the lense and just turned the ring and that effects the light meter so it has to be this i dont know what else it would be is there ne way i could fix this or is ther no hope for my camera?????

thanks

andy

Andy I'm not familiar with that particular camera. Have you tried a different lens to see if it mates properly? I think you need to first determine if it is a lens or a body problem.

If the camera body controls the aperture, then set the lens aperture ring to wide open before attaching it to the camera.

i have tried many different things like other lenses and opening the apriture to the largest openings soo i dont know what the problem is i asked the guy i got it from and he said that he had no problem with is soo i dont know i think im gona take it in to the camera shop that fixed it for me when the shutter was jammed so i think they will be able to tell i will play with it and see what i can do i hope its not the body or the lenses cause i just got the camera like 3 weeks ago

so it dosent look like i will be able to get it fixed this weekend because of the weather so that sucks im gona be sooo behind in class o well this sucks