Hi,
This is definitely a server problem. Because i have seen this kind of error before in this forum. I have solved it already but honestly i don't remember how. So, Please create me a joomla (super) administrator account, send it to This email address is being protected from spambots. You need JavaScript enabled to view it. and let me take a look at your backend. I will try to come up with a solution. If i change anything or modify any PHP file, i will provide you the detailed information about my touches.
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 to avoid the confusion in our end.
Cheers.