My seagate 500 GB hard disk got corrupted using the disk wizard incorrectly,how to repair it?

I wanted to convert my external hard disk from NFTS to FAT32 format and I was using seagate disk wizard. I guess I did some wrong inputs and now it says to be corrupt and inaccessable..i require help to repair it completly and I dont bother about my previous files in it.pls do help...

"Corrupt and inaccessable" doesn't say much. Which operating system you are using, what you are trying and what happens when you try would be more helpful. If you don't care about losing what's on the drive, follow the procedure for reformatting it. If you expect to be able to boot from the drive, that requires additional procedures. Look at the help files for the operating system you are using for how to reformat a disk and make sure you select the right drive when you do the reformat.