[TYPO3-shop] categories:select doesn't work

[Robert Grede]

hello,

typo3 4.1.6
tt_products 2.5.6

I want to use categories:select for the categories dropdown-list.
The categories are placed in the option tags, but the first item remains 
empty ond the onchange handler has no effect.

It would be nice, if anyone has an idea!

i use this template:

<!-- ###ITEM_CATEGORY_SELECT_TEMPLATE### begin
	This subpart is used to display the select-boxes of categories.
	-->
	<!-- ###CATEGORY_SINGLE### begin-->
		###ITEM_SINGLE_PRE_HTML###
		<!--###LINK_CATEGORY### begin-->
			###LIST_LINK###
		<!--###LINK_CATEGORY### end-->
		###ITEM_SINGLE_POST_HTML###
	<!-- ###CATEGORY_SINGLE### end-->

	<!-- ###CATEGORY_SINGLE_2### begin-->
	<!-- ###CATEGORY_SINGLE_2### end-->

	<!-- ###CATEGORY_SINGLE_3### begin-->
	<!-- ###CATEGORY_SINGLE_3### end-->

	<!-- ###CATEGORY_SINGLE_4### begin-->
	<!-- ###CATEGORY_SINGLE_4### end-->

	<div id="ArticleId">Das ersetzen</div>
<!-- ###ITEM_CATEGORY_SELECT_TEMPLATE### end -->

this is in the source:

<select id="cat1" onchange="fillSelect(this,2,1);">
	<option value="0"></option>
	<option class="act" value="1">
		Honig
	</option>
	<option class="act" value="2">
		Pollen
	</option>
	<option class="act" value="3">
		Propolis
	</option>
	<option class="act" value="4">
		Bienengift
	</option>
	<option class="act" value="5">
		Gelee Royal
	</option>
	<option class="act" value="6">
		Wachs
	</option>
	<option class="act" value="7">
		Imkereibedarf
	</option>
</select>

regards,
Robert G.