Installing OTMbox template on joomla 2.5.18

Hello
I have purchased a standard membeship few days ago and having difficulties installing the template I downloaded (OTMBOX) but when I try to install on joomla 2.5.18 it take s along time and them I get this error message;
The connection was reset

The connection to the server was reset while the page was loading.

The site could be temporarily unavailable or too busy. Try again in a few moments.
If you are unable to load any pages, check your computer's network connection.
If your computer or network is protected by a firewall or proxy, make sure that Firefox is permitted to access the Web.

Ehen I tried with a different template it was installed successfully. I am using firefox 27.0.1 browser.
You help is greatly appreciated.

Hello,

You're installing template(OT_Mbox_Joomla_Template_Installer.zip) only or quickstart (OT_Mbox_Quickstart_Demo_Package.zip) package ?

I think you need to set the greater value of upload_max_filesize and post_max_size in your php.in

Regards