Do I need a different MIDI cord or keyboard?

Our SM package just arrived last night. I got the program installed on the computer, but I can not get the keyboard connected to the computer. We "inherited" an older Casio WK-200 keyboard. I bought the cord from SM, but it doesn't seem to be compatible with the keyboard. I will try to attach pictures of the keyboard's plug in area to see if anyone knows what to do. The keyboard says it is general MIDI, but there isn't the round 5-pin holes for in and out MIDI. Also the USB port is shaped differently than any that I have seen. I am hoping that I can just find a different cord and will not have to buy a keyboard that really is compatible. Everything else seems to be working just fine, but I can't tell for sure without having the keyboard hooked up to the computer.