1TB Hard Drive not working properly

Um, hello yes, I have a problem that I desperatly need to be fixed. You see, I had my 1TB My Book Hard drive for 4 months and everything was working fine until a few days ago. My hard drive can no longer be recognized as one, yet in device manager, it says it is working perfectly. Basically, it notices it, but all of my data is inaccessible. I tried nearly everything, yet it's to no avail. I am just a college student, so getting this repaired is absolutely out of the question. So please help me!

I am using 32-bit Windows 7, by the way.