Thanks for the reply. I guessed permalinks had to be involved. The original wordpress blog all works fine and is set to default (?p=123).
If I set the wordpress RC blog to default, I get "The requested URL /wordpress32RC/.php was not found on this server." and a 404 error message.
I've set it as "/%year%/%monthnum%/" which is where the files reside, but I get the problem you see.
I'm a wordpress and permalink novice and would appreciate any helpful advice. I'm sure it's really straightforward if I just knew. I've got both blogs running through the same remote server and have made sure to have a different "$table_prefix" in wp-config for each version of wordpress.
I also have the wordpress RC blog set up locally using mysql and a local identical database and it works perfectly using the default permalink. I just can't think what I've done wrong on the remote server.