Ivy,
Similar to the post above I just purchased emember/estore and when I try to activate emember I reciever the following error. Looks like the estore installed fine.
Parse error: parse error, unexpected T_OBJECT_OPERATOR in /home/www/ltsleaderboard/wp-content/plugins/wp-eMember/auth.php on line 156
I am using the latest version of WP and I have my hosting through Net Nation.
Please let me know if you require additional information.
Thanks