In reply to roopatoms:
Your problem is the hierarchical path in the uvm_config_db.
Is it correct the internal signal you want to set is part of your SV interface instancee in0?
If so you do not need an additional interface instance.
With the bind construct you have 2 options:
(1) binding to a design in your DUT
(2) binding to a certain instance in your DUT.
In case (1) you do not need to define an hierarchical path. In case (2) you have to specify the hierarchical path to the instance.