RFC Connection error between R/3 4.7 & ECC 6.0

Hi all,
I m receiving the following error when i test the RFC connection between the mentioned systems..
/ CPIC-CALL: 'ThSAPCMINIT' : cmRc=20 thRc=665#Unknown service
DEV_W0 file contains the following information:
M *****************************************************************************
M *
M * LOCATION    SAP-Gateway on host IGATESAP06 / sapgw00
M * ERROR       service 'sapgw01' unknown
M *
M * TIME        Wed Apr 22 03:59:51 2009
M * RELEASE     640
M * COMPONENT   NI (network interface)
M * VERSION     37
M * RC          -3
M * MODULE      ninti.c
M * LINE        463
M * DETAIL      NiPGetServByName: service 'sapgw01' not found
M * SYSTEM CALL getservbyname
M * COUNTER     2704
M *
M *****************************************************************************
M
A RFC 2272 CONVID 90657609
A   * CMRC=20 DATA=0 STATUS=0 SAPRC=665 ThSAPCMINIT
A RFC> ABAP Programm: RSRFCPIN (Transaction: SM59)
A RFC> User: 704817 (Client: 800)
A RFC> Destination: ISMCLNT500 (handle: 2, , {8E460E4B-7D68-4FAE-A9BD-E212DAFA6A8E})
A RFC> Called function module: RFC_PING
A TH VERBOSE LEVEL FULL
A ** RABAX: end RX_GET_MESSAGE
Could any one pls. help me..
Thanks & Regards, Subbu

Hi all,
Thanks for ur replies.. I have added as u mentioned but i m receiving the below error??? Could u pls. suggest??
M *
M * LOCATION    SAP-Gateway on host IGATESAP06 / sapgw00
M * ERROR       service '?' unknown
M *
M * TIME        Wed Apr 22 04:58:46 2009
M * RELEASE     640
M * COMPONENT   NI (network interface)
M * VERSION     37
M * RC          -3
M * COUNTER     2733
M *
M *****************************************************************************
M
A RFC 2272 CONVID 94231859
A   * CMRC=20 DATA=0 STATUS=0 SAPRC=665 ThSAPCMINIT
A RFC> ABAP Programm: RSRFCPIN (Transaction: SM59)
A RFC> User: 704817 (Client: 800)
A RFC> Destination: ISMCLNT500 (handle: 2, , {34E2D1F9-B021-4B04-BD35-16E04AF4BD11})
A RFC> Called function module: RFC_PING
A TH VERBOSE LEVEL FULL
A ** RABAX: end RX_GET_MESSAGE
thanks,
Subbu

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