Please Help me!!!

Each time I go into a page with search functions I get this error:

Warning: unexpected error in date() in c:\program files\easyphp\www\admin\functions.php on line 1694

I've installed Afterburner's newstatistik.php, Last 10 Searches hack and some other hack. I think the line where I get this error is:

PHP Code:

// ###################### Start show_nopermission #######################
function vbdate($format,$timestamp) {
  global $bbuserinfo,$timeoffset;

  return date($format,$timestamp+($bbuserinfo['timezoneoffset']-$timeoffset)*3600);

} 


In the return string. What could be the cause of that error?

Thanks in advance.

[Velocd]

I have this hack installed as well, but unless I have an older version when I checked my functions.php the function used was not:

PHP Code:

function vbdate($format,$timestamp) { 


but:

PHP Code:

function vbdatenoty($format,$timestamp) { 


While here is my vbdate function:

PHP Code:

function vbdate($format,$timestamp) {
  global $bbuserinfo,$timeoffset, $dateformat, $timeformat;

  if ($dateformat==$format) {
    $todaystamp=mktime();
    $todaydate=date($format,$todaystamp+($bbuserinfo['timezoneoffset']-$timeoffset)*3600);
    $yestdate=date($format,(($todaystamp-86400)+($bbuserinfo['timezoneoffset']-$timeoffset)*3600));
    $date = date($format,$timestamp+($bbuserinfo['timezoneoffset']-$timeoffset)*3600);
    if ($date==$todaydate) {
      $date="Today";
    }
    if ($date==$yestdate) {
      $date="Yesterday";
    }
  } else {
    $date = date($format,$timestamp+($bbuserinfo['timezoneoffset']-$timeoffset)*3600);
  }
  return $date;
} 


Which has the "yesterday, today" hack installed.

Maybe that might help..?