Some theme pages not working

I installed a premium theme that I really like, and had it going fine, learning all about WordPress. After a few days, five of the seven theme admin pages stopped working, though the pages themselves were visible. (The theme admin pages that didn’t work gave me 500 Internal Server Errors.) I decided to reinstall Worpress, then the theme. (This time, I installed the theme directly from WordPress, instead of manually on the Network Solutions server as I had done the first time.)

When I did so, Worpress told me this:

Unpacking the package…
Installing the theme…
Theme installed successfully.

Warning: fopen(/data/23/2/5/96/2168096/user/2379578/htdocs/wp-content/themes/MediaConsultTheme/style.css) [function.fopen]: failed to open stream: No such file or directory in/data/23/2/5/96/2168096/user/2379578/htdocs/wp-includes/functions.php on line 4165

Warning: fread(): supplied argument is not a valid stream resource in/data/23/2/5/96/2168096/user/2379578/htdocs/wp-includes/functions.php on line 4168

Warning: fclose(): supplied argument is not a valid stream resource in/data/23/2/5/96/2168096/user/2379578/htdocs/wp-includes/functions.php on line 4171

Now, I don’t even see any of the pages, expect for the home page. (The others give me 404 Page Not Found.)

The website, still under construction is at
http://www.associationpodcasting.com

I didn’t spend a lot on the theme, and the designer does not really offer support. Your help is greatly appreciated.

Sincerely,

Kevin