How To Remove HDD Password In A Gateway Notebook

I have a gateway notebook NV51B02h and I thought it would be good to add a HDD password at setup. That was the easy part. I then wanted to see how easy it is to remove the HDD password from setup. I know the password, of course, and went into security at F2 . HDD password was in "SET". I tried to remove the existing password and was opted to type a new password twice( to make sure the new ones matched) and just hit enter key twice. The HDD said it was now CLEAR , just like before this all started. Now , when i shutdown and boot up the same HDD Password need comes up