'External' HD - All data gone. Partitions still there.

Hello,

I've just experienced my 'external hard drive' not letting me access any data. I put 'external hard drive' in apostrophes, as it's actually an old SATA Internal Hard drive, in an external case.

This is what happened;

The hard drive was partitioned into two partitions. One about 100GB large which had Windows 7 installed on it, from when I used it inside my desktop. Another which was encrypted with TrueCrypt and was about 800GB large. I tried loading the second partition with Truecrypt, but the computer locked up. In the end I had to turn off the computer manually by the power.

I booted up and I couldn't see the hard drives at all - not even in Computer Management. I turned the HD power on and off a couple times and eventually they were viewable - only they'd turned into three partitions, with an extra 24GB partition as the active, primary partition. It might've been that way before but not viewable in My Computer.

Now I can see the sizes of the partition in Computer Management, but they show as 0MB in My Computer, as if I'd not formatted them. When I try open them in My Computer though, it lets me open them - it doesn't tell me they need formatting.

I'm currently running TestDisk, but it can only see the 24GB partition.

Any ideas for how I can recover my data?

Edit: TestDisk Results: No Recoverable Partition Found.

Also noticed file system now says RAW.