Okay tried it again this morning and it worked. No idea why.
Anyway have created the rgc file and saved it into the RssWebGenerator folder.
Now getting the following error when browsing to the web page:
Description: An error occurred during the processing of a configuration file required to service this request. Please review the specific error details below and modify your configuration file appropriately.
Parser Error Message: Could not load file or assembly 'ADODB, Version=7.0.3300.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a' or one of its dependencies. The system cannot find the file specified.
Right, I found a copy of adodb.dll and copied that into the bin folder which seems to have stopped this error.
(Hope folks are learning from all my mistakes now :-))
I'm glad you got it sorted and thanks for sharing your solutions.