Shop order custom-data field not showing

Hi,

For a shop order maintenance we are trying to populate data in a custom field. XSLT mapping has been done as per below.

                                        <sch:CustomField>

                                          <sch:Attribute>AUFNR</sch:Attribute>

                                            <sch:Value><xsl:value-of select="IDOC/E1AFKOL/AUFNR"/></sch:Value>

                                       </sch:CustomField>

In the response document the value is being retrieved properly. But the field "ECC Production Order No" is not populated under Custom Data tab.

Custom field section in the response XML is below.

Any idea... Please share.