Error message not displaying

I installed 2.7
installtion is suceess
when I enter wrong user id or password the login page displays atext field with red back ground but does not display error message

Same happens when I try to register (with Sabre or Register Plus)

I deactivated all plug-ins but still same

I upgraded to 2.7.1 through automatic upgrade, it was again successful but I still do not get error messages displayed.

Thanks in advance for kind support