BPEL validate activity fault message

 Hi,
I have problem in validating schema,

I am using validate activity to validate my schema .xsd using restriction.
In my bpel process, my validate activity handled by a catch all and it catch when my input break restriction.

here is the source:

      

      <scope name="ValidatingInputScope" variableAccessSerializable="no">

            <faultHandlers>

              <catchAll>

                <assign name="Assign1">

                  <copy>

                    <from expression="1"/>

                    <to variable="isError"/>

                  </copy>

                  <copy>

                    <from expression="concat(ora:getFaultAsString(),' ',ora:getFaultName())"/>

                    <to variable="SingleResponse"

                        query="/ns8:Group/ns6:Description"/>

                  </copy>

                </assign>

              </catchAll>

            </faultHandlers>

            <bpelx:validate name="ValidateSingleRequest"

                            variables="SingleRequest"/>

          </scope>

But, when I use getFaultAsString() and getFaultName() I only get 

response like this