[TYPO3-project-formidable] Renderlet::Radiobutton: How to fetch the value?

[Michael Niemeyer]

In a test configuration there are 4 elements: an input field, two radio 
buttons, an action button and at last a window to show the information. 
It works fine ff i refer only to the textvalue. But after adding the 
radiovalue to the params the window will not be shown anymore.

The solution may be simple, but my question is:

Is it possible to refer to the value of a radiobutton by a button and 
if, how it must be done?

Some code follows to explain it further:

// Item 1 is an input field

        <renderlet:TEXT name="textvalue">
          <name>Textvalue</name>
        </renderlet:TEXT>
        
// Item 2 is a group of two radio buttons
        
          <renderlet:RADIOBUTTON name="radiovalue">
          <label>Radiovalue</label>
              <data>
                  <items>
                      <item caption="On" value="on"/>
                      <item caption="Off" value="off"/>
                  </items>
              </data>
          </renderlet:RADIOBUTTON>

// Item 3 is a button

            <renderlet:BUTTON name="buttonname" label="show info" >
                <onclick runat="ajax" cache="false" params="textvalue, 
radiovalue">
                    <userobj>
                        <php><![CDATA[
                $aParams = array_pop(func_get_args());
                            return array(
                  $this->aORenderlets["resultinfo"]->majixShowBox(),
                  
$this->aORenderlets["result"]->majixReplaceData(print_r($aParams,true))
                );
                        ]]></php>
                    </userobj>
                </onclick>
            </renderlet:BUTTON>

// Item 4 is an overlay box for showing the information

                <renderlet:MODALBOX name="resultinfo">
                    <childs>
                <renderlet:BOX name="result" mode="b" />
                <renderlet:BUTTON name="resultinfo_close" label="close">
                            <onclick runat="client">
                                <userobj>
                                    <php><![CDATA[
                                        return 
$this->aORenderlets["resultinfo"]->majixCloseBox();
                                    ]]></php>
                                </userobj>
                            </onclick>
                        </renderlet:BUTTON>
                    </childs>
                </renderlet:MODALBOX>