XPATH to reference a multiple node in a xml

Hi,

I have the following XML,

I need to refrence one POSTALCODE from POSTALCODES using RECCOUNT.

<Root><NoOfBookingReference>4</NoOfBookingReference><PostalCodes><PostalCode>JE2

6QP</PostalCode></PostalCodes><PostalCodes><PostalCode>JE27QE</PostalCode></PostalCodes><PostalCodes><PostalCode>WS7

3XL</PostalCode></PostalCodes><PostalCodes><PostalCode>ALB4BA</PostalCode></PostalCodes><PostalCodes><PostalCode>BH4

9LG</PostalCode></PostalCodes></Root>

I am trying to reference every individual postalcodes using the following xpath.

xpath(PostCodeMsg,"/*[local-name()='Root' and namespace-uri()='']/*[local-name()='PostalCodes' and namespace-uri()=''][recCount]/*[local-name()='PostalCode' and namespace-uri()='']");

and tried

tempString = System.String.Format("/Root/PostalCodes[{0}]/PostalCode",recCount);

PLEASE GUIDE me in the right was to access these in the message assignment.

Thanking you all in advance.