SOAP UI error from setup groovy script - soap

Question

SOAP UI error from setup groovy script
It is something wrong when I define the first string from the setNodeValue method. The XPath is not correct or I might be missing something.
Any ideas?
Error : org.apache.xmlbeans.XmlException:error:Unexpected element: CDATA
SOAP Request:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:log="Logisense_EngageIP">
<soapenv:Header>
<log:AuthHeader>
<!--Optional:-->
<log:Username>vv</log:Username>
<!--Optional:-->
<log:Password>vv</log:Password>
</log:AuthHeader>
</soapenv:Header>
<soapenv:Body>
<log:CreateUser>
<!--Optional: DYNAMIC VALUE -->
<log:username>${username}</log:username>
<!--Optional:-->
<log:password>test</log:password>
<!--Optional:-->
<log:alternativeUsername>de</log:alternativeUsername>
<!--Optional:-->
<log:roleName>admin</log:roleName>
<!--Optional:-->
<log:cultureName>English</log:cultureName>
<!--Optional:-->
<log:languageName>English</log:languageName>
<!--Optional: -->
<log:ownerUsername>admin</log:ownerUsername>
<!--Optional:-->
<log:parentUsername></log:parentUsername>
<!--Optional:-->
<log:userStatusTypeName>Enabled</log:userStatusTypeName>
<!--Optional:-->
<log:creditRatingName>Default</log:creditRatingName>
<!--Optional:-->
<log:billGroupName>Default</log:billGroupName>
<log:expireDate>2015-09-12</log:expireDate>
</log:CreateUser>
</soapenv:Body>
</soapenv:Envelope>
Groovy script setup :
def groovyUtils = new com.eviware.soapui.support.GroovyUtils(context)
def holder = groovyUtils.getXmlHolder("CreateUserRequest1#Request")
holder.setNodeValue("/soapenv:Envelope/soapenv:Body/log:CreateUser/log:username","Jose Amaral")
holder.updateProperty()