Hi Experts!
We are implementing SAPUI5 HR renewal Services with NW 7.4 and EHP7.
When we execute the approval applicaton, we are facing the following error message:

The error log shows that the TASKPROCESSING Service is missing:

I've checked already the following help-document:
http://help.sap.com/erp_hcm_ias_2013_02/helpdata/en/53/c46f8fc17a45088235db354b070a6e/frameset.htm
We activated all the business functions. But indeed, the oData Service /IWPGW/TASKPROCESSING is missing (or at least not activated yet).
When I try to add this Service via /IWFND/MAINT_SERVICE, there is no search result:

How can we add / activate this service?
Thanks in advance!