RFC works - JCo doesn't

Question

Hello,
we have a SAP/R3 system (QW8) which we bound to an WebAS successfully ( that means that RFC call via rz70 was successful and system was added to technical landscape also).
When we try to create JCo connection, we get the following
Failed to ping JCo destination 'test2'.
or
  com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to message server host failed Connect_PM  TYPE=B MSHOST=pwdf0672 GROUP=PUBLIC R3NAME=QW8 MSSERV=sapmsQW8 PCS=1 ERROR       partner not reached (host 10.17.73.95, service sapmsQW8) TIME        Wed Nov 02 10:41:00 2005 RELEASE     640 COMPONENT   NI (network interface) VERSION     37 RC          -10 MODULE      nixxi_r.cpp LINE        8634 DETAIL      NiPConnect2 SYSTEM CALL SiPeekPendConn ERRNO       10061 ERRNO TEXT  WSAECONNREFUSED: Connection refused COUNTER     1 
The system is there, we can ping it via cmd line and we added sapmsQW8 3225 to the services file also. The PUBLIC group does also exist.
When we used rz70 we took "localhost" and "sapgw25" as params.
So maybe anybody can help us out with that,
Clemens

Answer 1

Hi Dharmi,
I appreciate your help very much!
So I created a JCo "test3" with Client 100 and I checked "Use local Engine" and it is an "Appl.Data" Connection
I provided my username and password in capitals of the R/3 system and Group is PUBLIC.
The ping fails and when testing it gives:
com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to message server host failed Connect_PM  TYPE=B MSHOST=pwdf0672 GROUP=PUBLIC R3NAME=QW8 MSSERV=sapmsQW8 PCS=1 ERROR       partner not reached (host 10.17.73.95, service sapmsQW8) TIME        Wed Nov 02 11:25:20 2005 RELEASE     640 COMPONENT   NI (network interface) VERSION     37 RC          -10 MODULE      nixxi_r.cpp LINE        8625 DETAIL      NiPConnect2 SYSTEM CALL SiPeekPendConn ERRNO       10061 ERRNO TEXT  WSAECONNREFUSED: Connection refused COUNTER     1 
When I set up the same thing wit "Dictionary Meta Data" it says:
com.sap.mw.jco.JCO$Exception: (102) RFC_ERROR_COMMUNICATION: Connect to message server host failed Connect_PM  TYPE=B MSHOST=pwdf0672 GROUP=PUBLIC R3NAME=QW8 MSSERV=sapmsQW8 PCS=1 ERROR       partner not reached (host 10.17.73.95, service sapmsQW8) TIME        Wed Nov 02 11:27:37 2005 RELEASE     640 COMPONENT   NI (network interface) VERSION     37 RC          -10 MODULE      nixxi_r.cpp LINE        8625 DETAIL      NiPConnect2 SYSTEM CALL SiPeekPendConn ERRNO       10061 ERRNO TEXT  WSAECONNREFUSED: Connection refused COUNTER     1
Regards,
Clemens