Sony a55 not reading/detecting SD card. Need help now!

Hi everybody! Im into astrophotography, and use a sony A55 to take shots through my telescope.

Just last night my sony stopped detecting my SD card. I took it inside to see if my computer could

read it, and it could thankfully. But now im stuck with the task of trying to fix this issue so my

A55 will read it. I have no idea what to do here, but im sure one or two of you do. If you do,

could you help me out? Theres a close conjunction of Jupiter and the moon tonight, and

I want to fix this soon so I can take some pictures.

TL;DR: My A55 cant read my SD card but my computer can. Wat do?

Thanks everybody.

It simply does not detect the SD card. And yes, the SD cars is inside the camera.