WampServer

I seem to have a problem when posting more then 4 values.
this is the script
echo "<form method=post action=usercreate.php>\n";
if($_POST[modules]==""
{
echo "<select name=modules>\n";
for($i=0;$i<count($modules);$i++)
{
echo "<option value=$modules[$i]>$modules[$i]</option>\n";
}
echo "</select><br>\n";
}
else
{
if($_POST[LT]=="" || $_POST[PORT]=="" || $_POST[vp]=="" || $_POST[vc]=""
{
echo $_POST[modules]."<br>";
echo "<INPUT TYPE=hidden name=modules value=$_POST[modules]>";
echo "LT:<INPUT TYPE=text NAME=LT SIZE=4>";
echo " PORT:<INPUT TYPE=text NAME=PORT SIZE=4>";
echo " VP: <INPUT TYPE=text NAME=vp SIZE=4>";
echo " VC: <INPUT TYPE=text NAME=vc SIZE=4><BR>";
}
else
{
//echo $_POST[veecee]."<br>";
if($_POST[moduleend]==""
{
echo $_POST[modules]."<br>";
echo "<INPUT TYPE=hidden name=modules value=$_POST[modules]>";
echo "<INPUT TYPE=hidden name=PORT value=$_POST[PORT]>\n";
echo "<INPUT TYPE=hidden name=LT value=$_POST[LT]>\n";
echo "<INPUT TYPE=hidden name=vp value=$_POST[vp]>\n";
echo "<INPUT TYPE=hidden name=vc value=$_POST[vc]>\n";
echo "LT= $_POST[LT] PORT= $_POST[PORT] VP= $_POST[vp] VC= $_POST[vc]<br>\n";
echo "<select name=modules>\n";
for($i=0;$i<count($modules);$i++)
{
echo "<option value=$modules[$i]>$modules[$i]</option>\n";
}
echo "</select><br>\n";
}
}
}
echo "<INPUT TYPE=submit VALUE=Verzenden>";
echo "</form>";

It does't seem to give the last $_POST[vc] everytime.
Any idea what this is?
Thx in advance