vad har jag missat? det har fungerat förut

jag får dessa fel när jag kör min index.php.. snälla kolla igenom koden längre ner.. jag ser vad jag gjort för fel.

Warning: Supplied argument is not a valid MySQL result resource in D:\ftp\www\index.php on line 26

Warning: Supplied argument is not a valid MySQL result resource in D:\ftp\www\index.php on line 53

sen när jag ska skriva in information funkar inte detta.. ser inget fel? kanske ni gör?! tack på förhand!

Kod (skicka.php):

<?php require('db.php'); $dbinfo = mysql_query("insert tb_matches (matches_type, matches_date, matches_time, matches_versus) values ('$matches_type, $matches_date, $matches_time, $matches_versus')");?>

Kod (index.php):

<?php include('header.php'); ?>

<?php require('db.php'); ?>

<?php
$day = date("w");
$dayarray = array("söndag","måndag","tisdag","onsdag","torsdag","fredag","lördag"); 
$month = date("n")-1;
$montharray = array("01","02","03","04","05","06","07","08","09","10","11","12");
$date = date("j");
$time = date("H:i");
$year = date("y");
 echo "
  <p>\n
  $dayarray[$day] $date/$montharray[$month]/$year $time\n
  </p>\n
  ";
?>

<p>
<a href="add.php?cmd=match">Add match</a>
</p>

<?php
$data = mysql_query("select * from tb_matches");
 while($array = mysql_fetch_array($data))
 {
  echo "
  <table cellpadding=\"0\" cellspacing=\"0\" width=\"480\">
  <tr>
  <td bgcolor=\"#736357\" width=\"5%\" align=\"center\">
  $array[matches_id];
  </td>
  <td bgcolor=\"#736357\" width=\"15%\">
  $array[matches_type];
  </td>
  <td bgcolor=\"#736357\" width=\"20%\">
  $array[matches_date];
  </td>
  <td bgcolor=\"#736357\" width=\"10%\">
  $array[matches_time];
  </td>
  <td bgcolor=\"#736357\" width=\"40%\">
  $array[matches_versus];
  </td>
  <td bgcolor=\"#736357\" width=\"10%\">
  $array[matches_result];
  </td>
  </tr>
  ";
 }
$data = mysql_query("select * from tb_teams");
 while($array = mysql_fetch_array($data))
 {
  echo "
  <tr>
  <td bgcolor=\"#998675\" colspan=\"6\" align=\"center\">
  $array[team];
  </td>
  </tr>
  <tr>
  <td bgcolor=\"#736357\" width=\"50%\" align=\"center\" colspan=\"6\">
  <a href=\"add.php?cmd=team\">Add player</a>
  </td>
  <td bgcolor=\"#736357\" width=\"50%\" align=\"center\" colspan=\"6\">
  <a href=\"add.php?cmd=result\">Add result</a>
  </td>
  </tr>
  </table>
  ";
 }
?>

<?php include('footer.php'); ?>