I am using a php based shopping cart. For some reason when I set up and account in the program, and try to check out I get this looping error.

Warning: feof(): supplied resource is not a valid stream resource in /includes/classes/http_client.php on line 374

Warning: fgets(): supplied resource is not a valid stream resource in /includes/classes/http_client.php on line 375

The funny thing about this is that this is Oscommerce based program. I have tried 3 different flavors of this program, and I keep running into the same error on all different programs. I can not get anybody to respond to me.
Here is the code information in question.

/**
 * processHeader() reads header lines from socket until the line equals $lastLine
 * @scope protected
 * @return array of headers with header names as keys and header content as values
 **/
    function processHeader($lastLine = "\r\n") {
      $headers = array();
      $finished = false;

      while ( (!$finished) && (!feof($this->socket)) ) {
        $str = fgets($this->socket, 1024);
        $finished = ($str == $lastLine);
        if (!$finished) {
          list($hdr, $value) = split(': ', $str, 2);

Can you help me? I have searched all over the net for answers.