Identity Safe not providing password anymore

I have been using Identity Safe for nearly a year and it worked great.  About a month ago, Identity safe would no longer provide the password (username was OK) for one of the sites.  Yesterday I began to experience the same thing with another site (American Express).   I'm running Windows 7,  IE8 (32 bit) and NIS 18.5.0.125.  Nothing else changed on the computer that I know of.  Any ideas?