In that situation, your locally cached data may be corrupt or may be having trouble updating. Flushing/Refreshing the cache can be a great way to address this and will usually get things back on track.
1.Open the My Secure Backup program on your computer (Should appear either in the list of programs or as a small icon in the bottom right hand corner near the data and time)
2.Select "Online Disk" in the menu bar
3.Hover over "Cached Data" to reveal the next section
4.Click "Expire Cached Data"
5.Repeat steps 2-3 to also select "Remove Cached Directories" and "Remove Cached Files"