Looping Problem

Hi,
I have input like this:
 
<ns0:Details xmlns:ns0="http://Tester.Schema1"><Loop><PO><PONUM>990</PONUM> <POCond>Nume</POCond> </PO><SKU><SKU1>The po Message</SKU1> </SKU></Loop><Loop><PO><PONUM>990</PONUM> <POCond>Boome</POCond> </PO><SKU><SKU1>the order consi</SKU1> </SKU><SKU><SKU1>sts of the following it</SKU1> </SKU><SKU><SKU1>em electronics</SKU1> </SKU></Loop></ns0:Details>

I want to get all the fields of SKU1 concatenated and passed to a Concatenate Funcoid(Note:- for each message)

i.e..in the above example i want the following in a concatenate funcoid.

Nume=The po Message;Boome=the order consists of the following item electronics;

I tried with Concatenate() and CumulativeConcatenate() but it is reading only first occurance of SKU1 record and ignoring the rest...

Nume=The po Message;Boome=the order consi;

how can i achieve this?

Thanks,

Naveen.