DDIC & RFC Problem

i have posted same in oracle section but not solved...

i am installing SAP BI IDES 7.0 ( Netweaver SR2 ) but at DDIC password check master password is not working and also i have go through other forums and reset password from SAPGUI but then "unable to open RFC connection' error is coming.

please guide me what to enter at DDIC password prompt and how to solve RFC connection problem.

Regards,

Rocks.