Cannot create folder on Vista

[FireX]

Hello,

Here is my question:

When I try to create new folder, I get an error "Cannot read from the source file or disk". It is an external drive. I should point out that at one point the drive was connected to a different computer and shared over the network. I believe it was unplugged without stopped sharing. Another possibility is that I was trying to transfer 224 gigabytes of photographs to that drive, three times, and each time the drive got disconnected. I can access the drive fine, and I can read all the files on it.

using windows Vista Ultimate SP1
The hard drive is Western Digital MyBook 500gb

This does not happen with the other 2 external drives that I have

Please help
Thank you