ESS/MSS with more ECC Systems sap.wdarfc.useSys Problem

Hello ,

we have more a ECC Systems and on one ESS/MSS Portal. Now I found the url Parameter "sap.wdarfc.useSys" in the sdn. In one test ESS Iview I set the Propoerty field to

sap.wdarfc.useSys=SAP_R3_SelfServiceGenerics_MetaDataFIN:XY&sap.wdarfc.useSys=SAP_R3_SelfServiceGenerics_MetaData:XY&sap.wdarfc.useSys=SAP_R3_SelfServiceGenerics:XY&

sap.wdarfc.useSys=SAP_R3_HumanResources:XY&sap.wdarfc.useSys=SAP_R3_HumanResourcesMetaData:XY&

sap.wdarfc.useSys=SAP_R3_HumanResourcesMetadata:XY&

sap.wdarfc.useSys=SAP_R3_Financials_MetaData:XY&

sap.wdarfc.useSys=SAP_R3_Financials:XY

Now should the WebDynpro connect to the system XY. But it raise an error:

That the MetaData RFC connect to system "AB"

What is wrong ? I have checked all JCO Connections.

Another question when the parameter works. Must I copy all the WD Iviews and replace the set "sap.wdarfc.useSys" Parameter ?

Regards

Daniel