Can't delete online backup - "Another Backup operation is running."

I actually tried to reply on this thread:

http://community.norton.com/t5/Norton-360/Norton-360-Online-backup-Can-t-delete-online-backups/td-p/505736/highlight/true/page/3

 

But the Reply button didn't work, so i had to open this thread.

 

I have Norton 360 Premier which is almost out of online backup space. So i wanted to delete some old sets i had to free up some space.

 

Trouble is, i wasn't able to. I tried to do this through the Where tab. I click on Delete Backed up Files, which presents me with a dropdown saying Please select the backup set to delete files from. Ok, so i do that, hit OK, and am presented with a list of files to choose from. I select all of them, click OK, then get a confirm box. I confirm the delete then get the message saying, "Another Backup operation is running. Please try again later."

 

So i waited a few minutes. Same thing. I waited a day. Same thing. And here i am writing this.

 

How can i delete old backup sets so that i can continue backup and not have to buy more storage space?