I need some help!!

I was setting up a new website for myself, and doing ok with it, slow going none the less. My host is Godaddy, and when I called them for some help they suggested that I switch from my Windows server to a Linux server and assured me that nothing would change from it, and that I would have better success manipulating things. So on there suggestion I switched, well.....now the site is gone....

Can anyone assist me with this on getting things squared away? They keep telling me I need to change the configure.php file, but unfortunately I dont know enough about this to know what that file is supposed to look like and what should/shouldnt be there.

Any and all help on this would be greatly appreciated.

Thanks