Simple membership Component-Modules Support

hi When i have activated simple membership then after The front end of the site looks fine, and I can log into it to make changes. When I go to the back-end login screen, I can log in, but immediately on login I'm taken to a completely blank page. There's nothing on the screen and nothing in the source code. i have edited my configuration.php and allowed error reporting to maximum, then i got this massage after login in to backend site.

Fatal error: Call to undefined method JApplicationAdministrator::getSiteURL() in /home/vol9_6/byethost24.com/b24_15915559/blueoneinfra.com/htdocs/components/com_simplemembership/compat.joomla1.5.php on line 79


please help me in this regard. what do i have to do.

Hello,

Give us please - link on website and admin access and we check, admin access You can send to our contact form.
ordasoft.com/About-us/OrdaSoft.html
Joomla Admin

username
password




Thanks,
OrdaSoft team.