xpath with namespace

[fadi aljabali]

i got the below XML request , and i need to do switch case using xPath as following :

<case xPath="//soapenv:Envelope" service="Order" />

or

<case xPath="//em:SendMessage" service="Order" />

but both cases failed , how should i do that , originaly i need to check if BankCode = 10 to be routed to certain service else to be routed to another one "Default"

<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:tem="http://tempuri.org/">

   <soapenv:Header/>

   <soapenv:Body>

      <tem:SendMessage>

         <!--Optional:-->

         <tem:BankCode>10</tem:BankCode>

         <!--Optional:-->

         <tem:BankPWD>?</tem:BankPWD>

         <!--Optional:-->

         <tem:MobileNo>?</tem:MobileNo>

         <!--Optional:-->

         <tem:MsgText>?</tem:MsgText>

         <!--Optional:-->

         <tem:SenderID>?</tem:SenderID>

         <!--Optional:-->

         <tem:MsgOption>?</tem:MsgOption>

      </tem:SendMessage>

   </soapenv:Body>

</soapenv:Envelope>