Template is not showing on the frontend

[artmosphere]

Hello,
I am new at Joomla. I have uploaded a template to my joomla site but the template is not showing on my site. I managed to do something to show the background and one page but that is it.
Here is a link to my website: www.artmospheregalleries.com
It should be looking like that: http://demo.cloudaccess.net/?template=cloudbase2

I also tried the beez template and other templates that come with Joomla - but nothing!
Thank you

[suhaspandit_09]

Hi artmosphere,

check wheather you downloaded correct template version or not.
if you are using joomla 1.5 then download 1.5 version template.

[artmosphere]

I checked that. I have the 2.5 and that is what I downloaded.
But also the templates that came with the joomla basic are not working. I can't even switch between the templates, they do not work, only the one I downloaded works but not good.
What can be the problem?
Should I reinstall everything from the start?

Thank you for your reply

[artmosphere]

Any way, I deleted everything and reinstalled Joomla - now it works fine