Identity Safe fails to Validate Password

I have been running Identity Safe for a maybe 2 years, alongside my Norton Internet Security product.  I also have Norton Utilities and an old version of SystemWorks installed.  A few months ago, Identity Safe began to intermittently fail to validate its password, eventually timing out.  I uninstalled and reinstalled Internet Security and the problem resolved for a few days.  It has now returned.

 

I am using a PC, which is on IE9 with Vista.  I have updated Norton and am on Version 21.3.0.12.  I have checked in Norton Management that my device is correctly listed.

 

I'd be grateful for some help with this.  Thanks.