I just got a new memory card for my phone and I put it in computer to get the pics off it. It loaded them up the first time, but I took the card out before I saved the images to my computer. I put the card back in, and nothing happens now. It doesn't show there is a device connected or anything. Computer doesn't do anything with it. Please help.

Did you try restarting the computer? I had this problem myself, and that solved it. Otherwise, can you connect the phone to the computer with a USB cable? You should be able to access the photos that way as well.