i'm having problems updating a calender to my database...

it does what its supposed to but it just won't add the calendar, it will let me write small things like a few words only... so how can i make it able to write the whole calendar in?

the code of the site:
Code:
<?php
session_start();
if(session_is_registered(myusername)){
if (isset($_POST['kalender'])) 
{
    if (empty($_POST['kalender'])) 
	{
  echo "jeg skriver ikke ingenting ind i databasen ;)";
	} else {
	
  $connection = mysql_connect("localhost","root","");
  mysql_select_db("kalender",$connection);
  
  $counter = mysql_query("SELECT * FROM kalender WHERE id = '1' "); /* made id to 1 because i wouldn't need more then 1 in this */
  $num = mysql_num_rows($counter);
  $kalender = $_POST['kalender'];
  if ($num == 0) {
  $result = mysql_query("INSERT INTO kalender (kalender) VALUES ('$kalender')");
  } else {
  $result = mysql_query("UPDATE kalender SET kalender = '$kalender' WHERE id = '1'");
  }

  
  if ($result) {
    echo "Success! :)";
  }
  else {
    echo "hmmm... der skete lidt af en fejl :(";
  }
  }
  

}
  ?>
<form name="opret2" action="?a=opret2" method="POST">
<table border="0">
<tr>
<td>Indsæt Kalender:<br>
&nbsp;&nbsp;<textarea cols="30" rows="10" name="kalender"></textarea></td>
</tr>
<tr>
<td>
<input type="submit" cols="30" rows="10" name="submit" value="Opret Event"></td>
</tr>
</table>
</form>

<?php
} else {
include("loginform.php"); 
}
?>
the code of the calender, i have no clue if it should be the size(length, size), i made a program to generate the code..
Code:
<table width='100%' border='1' style='border-width:1px;background:url(background2.PNG);border-collapse:collapse;'>
<tr style='text-align:right;vertical-align:top;height:40px;'>
<td colspan='7' ALIGN='center' VALIGN='middle' style='padding:2px;'><h1><b>Januar 2010</b></h1></td>
</tr>
<tr style='text-align:center;height:40px;'>
<td><h3>Mandag</h3></td>
<td><h3>Tirsdag</h3></td>
<td><h3>Onsdag</h3></td>
<td><h3>Torsdag</h3></td>
<td><h3>Fredag</h3></td>
<td><h3>Lørdag</h3></td>
<td><h3>Søndag</h3></td>
</tr>
<tr style='text-align:right;vertical-align:top;height:60px;'>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>1&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>2&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>3&nbsp;<br><center><a href='?b=Events'></a></center></td>
</tr>
<tr style='text-align:right;vertical-align:top;height:60px;'>
<td>4&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>5&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>6&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>7&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>8&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>9&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>10&nbsp;<br><center><a href='?b=Events'></a></center></td>
</tr>
<tr style='text-align:right;vertical-align:top;height:60px;'>
<td>11&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>12&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>13&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>14&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>15&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>16&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>17&nbsp;<br><center><a href='?b=Events'></a></center></td>
</tr>
<tr style='text-align:right;vertical-align:top;height:60px;'>
<td>18&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>19&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>20&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>21&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>22&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>23&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>24&nbsp;<br><center><a href='?b=Events'></a></center></td>
</tr>
<tr style='text-align:right;vertical-align:top;height:60px;'>
<td>25&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>26&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>27&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>28&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>29&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>30&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>31&nbsp;<br><center><a href='?b=Events'></a></center></td>
</tr>
<tr style='text-align:right;vertical-align:top;height:60px;'>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
<td>&nbsp;<br><center><a href='?b=Events'></a></center></td>
</tr>
</table>