EHP4 installation using EHPI : Error message: DDIC password does not work:

Dear All,
    We are upgrating enhancement packages 4 using EHPI in 64 bit server. I am facing this error in Extraction phase , I have to provide DDIC / SAPServiceSID/ DB specific , next  says ddic password is not correct. But when i tried to login with the same password into 000 client, it works. But when through EHPI , it throws error. Kidnly check the error and please suggest me ... Thanks in advance..
Error message: DDIC password does not work: RFC call to failed with key RFC_ERROR_COMMUNICATION (open): SAP_CMINIT3 : rc=20 > Connect to SAP gateway failed Connect_PM DEST=R3D, GWHOST=SAPRBSBD-01, GWSERV=sapgw00, SYSNR=00 LOCATION CPIC (TCP/IP) on local host with Unicode ERROR partner 'SAPRBSBD-01:3300' not reached TIME Thu Dec 24 12:27:13 200 RELEASE 710 COMPONENT NI (network interface) VERSION 39 RC -10 MODULE nixxi.cpp LINE 3147 DETAIL NiPConnect2: 192.168.1.40:3300 SYSTEM CALL connect ERRNO 10051 ERRNO TEXT WSAENETUNREACH: Network is unreachabl.
Regards
Raj

Dear Rajeev,
DDIC pwd for 001 is not same as 001,Will that be a problem ? But the Extraction requests for DDIC 000 client password. Are you sure UME comes into this scenario ?
@ Raghu - I have checked the link and it speaks about the resetting the EHPI. I dont want to reset and want to solve ddic password error.
Sorry if am wrong
@ Gerard,
Yes the hostname is SAPRBSBD-01.I am able telnet the IP 3300 and it works fine. FQDN SAPRBSBD-01.chen.local. The smicm service entries are with SAPRBSBD-01 but not with FQDN. Changing it to FQDN will help us to resolve  the issue. Please suggest me.
Also the error  refers to some RFC connection, any idea on that.
Thanks to all and looking for your valuable suggestions.
Raj

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