modified profile.php does not recognize custom $_POST['do'] == "xx"

[PiroX]

Hi

i modified the profile.php and added a new part

PHP Code:

if ($_POST['do'] == 'ptbank')
{
  header('Location: profile.php?do=whyisitnotjumingtothis'); //<-- testing header() to see if it goes in here, but it never do!
  //code
}

if ($_REQUEST['do'] == 'bank')
{
  //code
  $templatename = 'tp_bank';
} 


Template tp_bank, is displayed correct

PHP Code:

<form action="profile.php?do=ptbank" method="post">
<input type="hidden" name="s" value="$session[sessionhash]" />
<input type="hidden" name="securitytoken" value="$bbuserinfo[securitytoken]" />
<input type="hidden" name="do" value="ptbank" />


<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
<tr>
<td class="tcat">Bank</td>
</tr>
<tr>
<td class="thead">$vbphrase[tp_info]</td>
</tr>
<tr>
<td class="panelsurround" align="center">
<div class="panel">
<div style="width:$stylevar[formwidth_usercp]" align="$stylevar[left]">

<fieldset class="fieldset">
<legend>$vbphrase[tp_info2]</legend>
<table cellpadding="0" cellspacing="$stylevar[formspacer]" border="0" width="100%">
<tr>
<td>$vbphrase[key_text]<br /><br /><span class="whiteb">Key:</span> <input name="key" class="bginput" type="text" size="45" maxlength="32" value="" />
<br/>
<br />
$vbphrase[spamfilter_notice]
<br /><br />
<div>
<center>
<input type="submit" class="button" value="Submit" />
<input type="reset" class="button" value="Reset" />
</center>
</div>
</td>

</tr>
</table>
</fieldset>

</div>
</div>

</td>
</tr>
</table>
</form>
<br /> 


if i call now profile.php?do=bank, then the template will be shown correct, if i enter a value and click submit, then it will always instant go to profile.php?do=bank again.

I dont understand why, where is my mistake?
What am i missing?

I hope someone can help me