Lost my backup after reinstalling n360

I reinstalled norton 360 v5 after havin problems with vers6. I used the norton tool to delete vers6 completely and reinstalled vers5 from the original purchased CD. I now cannot find my previous backups which I ran and saved in Norton's online secure storage. My current installed version does not pick up the fact that I had backed up all my data before the issue with vers6 and keeps prompting me to set up my back up.Can someone help me find my previous backups as I have data on them that is only there??

Help please.