HTTP/1.0 401 Unauthorized

Hi experts,

I have three SAP systems:

- System A - Netweaver 6.40 - server 1

- System B - NetWeaver 7.0 - server 2

- XI system - NetWeaver 7.0 - server 2

I create RFC to connect System B and XI system XI_INTEGRATIONSERVER with parameters:

Target host: <server>

Service No. 8022

Path: /sap/xi/engine/?type=entry

User: PIAPPLUSER

and everything is ok because after test I get status 500.

With same setting on System A I get error HTTP/1.0 401 Unauthorized

Please help me,

Drazen