Hi,
It might be a jQuery conflict issue. but without seeing your website. I can't say anything.
Please create me Joomla Super admin account and email it to This email address is being protected from spambots. You need JavaScript enabled to view it.
Let me take a look at your backend settings and run some benchmark tests
While emailing to This email address is being protected from spambots. You need JavaScript enabled to view it. Don't forget to include this forum topic's URL at the of your message (or in the Subject field) as reference to avoid possible confusion in our end.
Regards,
Support