SAP SCM 7.1 IDES installation Error at ' Import ABAP' phase

Dear Friends,

I was trying to install SAP SCM 7.1 IDES in the Local system where I already have ECC 6.0 Ehp 6 installed. At the time of 'Import ABAP' Phase I am getting the below error. Could you please help!

Process call 'E:\usr\sap\WM1\SYS\exe\uc\NTAMD64\R3load.exe -testconnect' exits with error code -1073740791

- During installation system asked Oracle 10g client ---> Provided oracle 10.2 client

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Already Installed

- Oracle 11g database

- ECC 6.0 Ehp 6

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kindly guide me the steps to follow for installation and how to use same IP with different instance to have RFC connections between ECC and SCM system.

Do we need to change the host file entry ?

Regards,

Yogi