[xsl] xsl namespace select elements

["Peter Ivan" <peter_ivan@xxxxxxxxxxx>]

Dear All

I have a simple xsl to run.
<?xml version="1.0" encoding="UTF-8"?>
<DeliveryCALetter xmlns="http://input.sire.nl/"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>
<levering>
<soort_bestand>RNE-CADO</soort_bestand>
<aanmaak_datum>20060118</aanmaak_datum>
<aanmaak_tijd>194838</aanmaak_tijd>
<raboict_ob_klant>CADO1</raboict_ob_klant>
<levering>
<DeliveryCALetter>

I need to select soort_bestand  value but it is not selecting the value
how could i select it.I tried many name spece commands but didint work.
can any one help me out.
peter

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