Problems with special SUBMIT-Button

[janrenzlow]

Your WebpageTest is a powerful tool. I want to test the speed of a browser game. I enter the credentials, but I can not press the button with a script.

I can make the login information to the public. It's just a test account.
http://koeln:pennergame.de
user: schlagbaum
password: mypassword

The source code of the section is:
<div id="login" class="zabsolute">
<form id="loginform" action="/login/check/" method="post">
<fieldset class="zleft-childs">
<label for="login_username">Spieler:</label>
<input id="login_username" class="text" type="text" maxlength="30" name="username">
<label for="password">Passwort:</label>
<input id="password" class="text" type="password" name="password" size="15" maxlength="32">
</fieldset>
<div>
<input class="submit" type="submit" value="Login" name="submitForm">
<a class="forgotten" href="/pw_forgotten/">Passwort vergessen</a>
</div>
</form>
</div>


My script is this
//This works fine
navigate koeln.pennergame.de
setValue name'username schlagbaum
setValue name'password mypassword
// problems from now on
//submitForm name'submitForm
clickAndWait innerText=Login
navigate koeln.pennergame.de/stock/plunder/

I need your help. Thanks in advance