Bad CD-RW disk, please help!

Thinking I could quickly erase all my files on the RW disk, I used Explorers formatting function for so doing. Unfortunately, since then I can gain no access to the RW disk and the formatting software (NERO Burning ROM) that originally formatted the RW disk seems unable to format it once again as a RW disk, or indeed as anything. Oh yes, the software goes through the motions as if formatting it, but the result is failure, i.e. Explorer is unable to gain access to the disk.

Once I got this error message upon trying to copy some files to the disk: "UDF Driver error: Please insert a new disc and repeat the operation. Details: [None given]"

I will be very happy to know how this RW disk can once again become a working RW disk.

Thanks for any help!

AndyŠ