Ok, had to figure it out myself. Web host company upgraded php so defualt was 5.5. Had to tell zc 1.5.0 to use php 5.3 Did this by adding the following to my htaccess file

Code:
AddHandler application/x-httpd-php53 .php


Errors gone, users can now log in and use the cart as I have it set up. Until I upgrade again.