CAN'T DO ANYTHING, connection error???

Can't do anything and i don't understand what I'm doing wrong.
I just installed Hikashop, finally I don't have any installation error, I had permission problems so I put 777 on most folders, but now when I try to manage products, category, users, etc... I can't do anything, I get connectioninterrupted error (I'm in localhost).

(going to .../administrator/index.php?option=com_hikashop&ctrl=product I get this)


Any hint would be greatly appreciated.
Thanks.

P.S. I'm new to joomla and of course hikashop

Hi,

Do you have this issue only on the HikaShop pages ?
Could you try to install again HikaShop over the current install ?

Yes I had this issue on several pages of hikashop admin-side; solved disabling xcache, but I don't know why it worked. Why did it worked?
(I installed hikashop many times as soon as joomla was installed)

I don't know. We don't have the problem on our end.