Header Errors

I have been working fine for a few months, I get this error trying load page
http://www.methodxfitness.com
and trying to login to Admin console.

Any assistance, point me in the right direction…..would be much appreciated.

Warning: fopen() [function.fopen]: Couldn’t resolve host name in /home/methodx/public_html/wp-includes/functions.php on line 4339

Warning: fopen(http://www.methodxfitness.com/wp-content/themes/amped/style.css) [function.fopen]: failed to open stream: operation failed in /home/methodx/public_html/wp-includes/functions.php on line 4339

Warning: fread(): supplied argument is not a valid stream resource in /home/methodx/public_html/wp-includes/functions.php on line 4342

Warning: fclose(): supplied argument is not a valid stream resource in /home/methodx/public_html/wp-includes/functions.php on line 4345