My Memory card isn't working, help? ?

I have recently lost my blackberry curve and had to buy an alcatel, forchantly I still had the blackberrys old memory card which worked perfectly in my alcatel, untill i took it out this morning, when I went to put it back in it came up telling me that I had a memory card in the phone then when I went to access the files it told me there was no memory card?
I have tried, turning the phone on and off, looking for the files else where on the phone, taking the memory card out again and plugging the phone into the computer.

Help?
My phone is a Alcatel Ot-880