The ':' character, hexadecimal value 0x3A, cannot be included in a name

I want to send xml request to webservice which in return will give me response.

following is the test example of xml request

<?xml version="1.0" encoding="utf-8"?>
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:SOAP-ENC="http://schemas.xmlsoap.org/soap/encoding/" xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:ns3662="http://tempuri.org">
  <SOAP-ENV:Header>
    <wsse:Security SOAP-ENV:mustUnderstand="1">
      <wsse:UsernameToken>
        <wsse:Username>Test</wsse:Username>
        <wsse:Password>Test</wsse:Password>
      </wsse:UsernameToken>
    </wsse:Security>
  </SOAP-ENV:Header>
  <SOAP-ENV:Body>
    <OTA_HotelAvailRQ xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" TimeStamp="2016-02-27T10:02:42" Target="Test" Version="2.002" RequestedCurrency="CHF" PrimaryLangID="EN" xmlns="http://www.opentravel.org/OTA/2003/05">
      <AvailRequestSegments MaximumWaitTime="30">
        <AvailRequestSegment AvailReqType="Room">
          <HotelSearchCriteria>
            <Criterion>
              <Address>
                <CityName>Zurich Airport</CityName>
              </Address>
              <HotelRef HotelCode="" HotelName="" AreaID="" />
              <StayDateRange Start="2016-02-28" End="2016-02-29" />
              <RoomStayCandidates>
                <RoomStayCandidate Quantity="1">
                  <GuestCounts IsPerRoom="true">
                    <GuestCount AgeQualifyingCode="10" Count="1" />
                  </GuestCounts>
                </RoomStayCandidate>
              </RoomStayCandidates>
            </Criterion>
          </HotelSearchCriteria>
        </AvailRequestSegment>
      </AvailRequestSegments>
    </OTA_HotelAvailRQ>
  </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

when i am trying to build above request xelememt,xattribute,,its throwing me error that :(Colun) etc not allowed.

Basically special characters.

Can You Please help me with the above Query Asap.

Thankyou