I installed Mobile Joomla and now can't get into backend

I installed Mobile Joomla and I now can't get into the back end.. Everytime I try to go to the administrator backend I get 
Not Acceptable! An appropriate representation of the requested resource could not be found on this server. This error was generated by Mod_Security. Help!! I need have this site finished tonight.. 

You can disable "mobilebot" plugin using phpMyAdmin (in #__plugins or #__extensions table depending on Joomla version). And actually MobileJoomla doesn't affect backend at all. Do you have that error after log into backend, or even on login form?