Delete partitions

I have a 80Gig external hard drive that needs to have the partitions removed. When I try using partition magic 8 I get the following error. How can I get around this and delete the partitions? There is no data on this disk and it is formatted as NTFS.
ERROR
Disk 6 (76316MB 9729c63s) appears to have partitions created using a different drive geometry (240h63s). This serious problem can lead to data loss. No partition manipulations should be made to this disk using this product or the operating system products. You should back up the data on this disk, delete all partitions. create new partition under the new drive geometry, and then restore your data using the backup.

 

Have you tried using the XP Disk Management to delete the partitions? . . Right click on My Computer . . select Manage . . Disc Managament.

Right click on the drive and delete the partitions

 

That did the job, but now the external had drive don't show in the explorer. How do I get it back on the list?

 

True . .

 

Thanks again some day I may learn all this stuff, but until that day arrives I will be back.