I was trying to put a few games on my calculator, and realized I didn't have the lastest OS. I downloaded the OS, and tried sending it to my calculator through the TI connect software and the usb silverlink cable, but the first time I tried it got to about 35% and said there was an error, so I retried and it didn't work. I can't get it to transfer over the OS and when I turn it on, it says 'Waiting... Please install calculator sofware now.' Since I can't get it to transfer, what can I do?