Protocol Handler Issues

Scenario:
You wrote a new Protocol Handler and configured it to be used by SharePoint Search.

Possible Errors:
1. Protocol Handler is not registered.
2. Access Denied

Possible Resolution:
1. Protocol Handler is not registered.
Make sure you have registerd the protocol handler assembly, you can verify the same by checking the Registry ( REGEDIT ) , make sure 'codebase' value is specified for the Protocol Handler binary

2. Access Denied
Protocol Handler uses two different accounts to get the information to be crawled.
-- First call to 'Init()' function is made using the Account running the deamon process( mssdmn.exe )
-- Second call to 'CreateAccessor()' function is made using the Account you have configured to access the particular Content Source