[TYPO3-formidable] error while using hdbmm extension

[Domi Garms]

Hello list,

I have a problem using DBMM extension for mm relations between my
tables. I installed the extension but I only get an error:

TYPE DBMM is not associated to any datahandlers

what do I miss, in the documentation nothing is described how Ill get it run.
        <?xml version="1.0" encoding="UTF-8"?>
       <formidable version="2.0.475"
	xmlns:datahandler="http://www.ameos.com/formidable/2.0.475/datahandler"
	xmlns:datasource="http://www.ameos.com/formidable/2.0.475/datasource"
	xmlns:renderer="http://www.ameos.com/formidable/2.0.475/renderer"
	xmlns:renderlet="http://www.ameos.com/formidable/2.0.475/renderlet"
	xmlns:validator="http://www.ameos.com/formidable/2.0.475/validator"
	xmlns:actionlet="http://www.ameos.com/formidable/2.0.475/actionlet">
	
	<meta>
		<name>Standard XML file</name>
		<form formid="first_test"/>
		<debug>true</debug>
		<displaylabels>true</displaylabels>
	</meta>
	<control>
		<datahandler:DBMM>
			<tablename>tx_aupairnetwork_administrator</tablename>
			<keyname>uid</keyname>
			<labelname>title</labelname>
			<mmrelations>
				<relation field="categories"
mmtable="tx_aupairnetwork_administrator_preferred_countries_mm" />
			</mmrelations>
			
			
		</datahandler:DBMM>
		<renderer:STANDARD/>
	</control>


Thanks,

Domi