Communication Channels are not displayed

Gurus,

I am not able see any communication channels in the RWB.

When I click the self test for "Are Communication Channels without errors?" I agetting the following response:

"0 communication channels have an error status0 communication channels inactive0 communication channels not providing any status information0 adapters logging communication-channel-independent processing errors "

Also, When I view thru filter with status all, "I am getting 0 communication channel found".

Kindly Advice.

Regards,

Siva