[TYPO3] cab TV getContentParts HELP

[Aji Johannes]

Hello Folk,

i have to add an image to the header of my website and i want to change 
the image only in few sites. i found the EXT cab TV getContentParts and 
i do like the tutorial in Documentation, but it is not working.
i add something like this in XML

<field_headerimage type="array">
<tx_templavoila type="array">
<title>HeaderImage</title>
<description>Select the HeaderImage of the page</description>
<sample_data type="array">
<numIndex index="0">Header Image</numIndex>
</sample_data>
<eType_EXTRA type="array">
 
<objPath>lib.headerimage</objPath>
</eType_EXTRA>

<TypoScript>
10= RECORDS
10.source.postUserFunc = tx_kbtvcontslide_pi1->main
10.source.postUserFunc.field = field_headerimage
10.tables = tt_content
10.wrap = &lt;!--TYPO3SEARCH_begin--&gt; | &lt;!--TYPO3SEARCH_end--&gt;
</TypoScript>
<oldStyleColumnNumber type="integer">1</oldStyleColumnNumber>
</tx_templavoila>
<TCEforms type="array">
<config type="array">
<type>group</type>
<internal_type>db</internal_type>
<allowed>tt_content</allowed>
<size>5</size>
<maxitems>200</maxitems>
<minitems>0</minitems>
<multiple>1</multiple>
<show_thumbs>1</show_thumbs>
</config>
<label>HeaderImage</label>
</TCEforms>
</field_headerimage>

and i have i TS setup like this:

#### H E A D E R   I M A G E ####

lib.headerimage = COA

lib.headerimage {
	stdWrap.ifEmpty.cObject = RECORDS
	stdWrap.ifEmpty.cObject {
		source.postUserFunc = tx_cabtvgetcontentparts_pi1->main
		source.postUserFunc.field = field_headerimage
		source.postUserFunc.uid = 3
		tables = tt_content
	}
	10 = RECORDS
	10{
		source.current=1
		tables = tt_content
	}
}


but it is not working, any idea ill be thankful

Johannes