Help Weird sim card problem - help?

[jccage]

Hey guys.

so, whenever i put my sim card in my incredible s, it says there is no sim inserted. However, other sim card work fine in the phone, and my sim card works fine in my lg optimus black.

it also detected the sim before and it was working fine, but then it ran out of reception, and when i restarted the phone it said no sim inserted again.

any help on how to fix this? Really need help!