I removed my memory card last night from my Canon a590IS to upload my pix from a card reader to my hard drive on my computer, now when I try to put the memory card back in the camera it does not want to fully go back in. This is the first time I have had this problem.

I locked and unlocked the memory card to no avail. The door will close with out the memory card in it, but when I try to put the memory card back in, it will not go in all the way.What to do?