[TYPO3-english] Can't get to work Mailformplus

[* k-do *]

Hi, I want a simple form to create fe groups using mailformplus.
I have a page with the mailformplus plugin and in the Setup of that page
there is the typoscript.
When I click "submit" nothing happens and nothing is saved to de DB. What
I'm doing wrong?
Here there is my template:

<!-- ###TEMPLATE_FORM### begin -->
###ERROR###
<form name="Formular" method="post" action="###REL_URL###"
enctype="multipart/form-data">
    <input type="hidden" name="id" value="###PID###">
    <input type="hidden" name="submitted" value="1">
    <input type="hidden" name="L" value="0">

    <div>
        <label for="title" accesskey="n">Titulo</label>
        ###error_title###<input type="text" name="title" id="title"
value="###value_title###" tabindex="1"/>
        <br/>
        <label for="subject" accesskey="s">Descripcion</label>
        ###error_description###<input type="text" name="description"
id="description" value="###value_description###" tabindex="2"/>
        <br/>
        <input type="submit" value="submit" tabindex="3"/><br/>
    </div>
</form>
<!-- ###TEMPLATE_FORM### end -->


And my typoscript:

plugin.tx_thmailformplus_pi1.saveDB = 1
plugin.tx_thmailformplus_pi1.saveDB {

    dbTable = fe_groups

    dbinsert=pid:33,hidden:0,deleted:0

    # [inputFieldName]:[DBName]
    mapping=id:cruser_id,title:title,description:description

    # set timestamp (submission time) to field crdate
    crdate = 1
}


Thank you