ORACLE SOA BPEL: Variable not set

i have this payload:

<inputVariable>
<part  name="payload">
<ns2:process>
<RequestID>162</RequestID>
<RequestModel>Assign Roles</RequestModel>
<RequestTarget>MARKETING OPERATOR</RequestTarget>
<RequesterDetails>...</RequesterDetails>
<BeneficiaryDetails>...</BeneficiaryDetails>
<ObjectDetails>
<name>MARKETING OPERATOR</name>
<attributes>
<Name>SoDCheckEntitlementViolation</Name>
</attributes>
<attributes>
<Name>SoDCheckResult</Name>
<Value>Passed</Value>
</attributes>
<attributes>
<Name>SoDCheckStatus</Name>
<Value>SoD check completed</Value>
</attributes>
<attributes>
<Name>SoDCheckTimestamp</Name>
<Value>Wed May 08 15:22:21 CEST 2013</Value>
</attributes>
</ObjectDetails>
<url>http://idmlocal:14000/workflowservice/CallbackService</url&gt;
<OtherDetails/>
</ns2:process>
</part>
</inputVariable>

and i want to copy the value of the attribute which name is SoDCheckResult in a custom varable called SoaStatus. What i have done is to create an assign component with this copy statement: