Hi new and need some help

Hi im new here...still trying to figure things out.

My current nopcommerce website is
http://muradrj.brinkster.net/buyeverythingforless/

I have 2 questions

1) Does anybody know why when you click on a category or product it gives me an error, it was working previously.

2) I'm using the following template
http://www.n-theme.com/products/8-nop-commerce-nclassic16-theme.aspx

I am trying to find the code for the background color of the actual website and i could not find it, i have looked through the code almost 4 times. If somebody can help me that will be great. I know html and java pretty well, I have worked with a few website just trying to figure out how nopcommerce is setup.

The error you are getting is because you need to set the correct permissions.  PLease see https://www.nopcommerce.com/boards/t/2358/gdi-error-after-installation-when-tryign-to-access-default-page.aspx

The background colour is set in the 'body' rule in the stylesheet at \NopCommerceStore\App_Themes\YourTheme\styles.css

Thx skiltz i got it to work. I know that the background color is under the stylesheet but i have looked through the code like 5 times already in the styles.css, could not find it please if somebody can help with this i will really be greatful.