XML Select

My attached code works exactly the way I need...but

I REALLY need the line
'<xml version="1.0" encoding="UTF-8"/>

To be this
<?xml version="1.0" encoding="UTF-8"?>

But everytime I try that it errors out

Declare @packet varchar(30)
Set @packet =	(SELECT '0000' + Cast(CAST(RAND() * 1000000000 AS INT) as varchar) + 
				Cast(CAST(RAND() * 1000000000 AS INT) as varchar))

Declare @clientAcctNum	varchar(10)
Set @clientAcctNum = '00123456'

Declare @clientUserID	varchar(10)
Set @clientUserID = '002345'

Declare @contactEmail	varchar(30)
Set @contactEmail = 'lbristerg@mydomain.com'

Declare @contactName	varchar(50)
Set @contactName = 'Bill Gatesg'

Declare @contactPhone	varchar(12)
Set @contactPhone = '(111)222-3333'

declare @xml xml
select @xml = '<xml version="1.0" encoding="UTF-8"/>
<Document>
  <XMLVersion Version="2.00"/>
  <Header>
       <PacketNum>' + @packet + '</PacketNum>
       <Test Choice="No"/>
       <ClientAccountID>' + @clientAcctNum + '</ClientAccountID>
       <ClientUserID>' + @clientUserID + '</ClientUserID>
       <ContactEmail>' + @contactEmail + '</ContactEmail>
       <ContactName>' + @contactName + '</ContactName>
       <ContactPhone>' + @contactPhone + '</ContactPhone>
       <SourceID/>
  </Header>' 
+ (
select top 1
      id, 
      firstName 'Debtors/Names/IndividualName/FirstName',
      lastName 'Debtors/Names/IndividualName/LastName'
from
      r_users
for xml path('Record')
) + '
</Document>'

select @xml

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