id safe will not fill att email login

win7, 64bit, ns2015,firefox38.o.5        after recovering from ns22.5 update, i finally was able to recover my local vault after being able to connect to norton server.  all my logins i tested auto-filled correctly except my att email account. it just refuses to fill. even after manually entering my info i get no prompt to save info.  this ns22.5 update has been a pain in the xxx.  any ideas or help will be greatly appreciated. thanks