Sweeper is part of the auto-processing sequence which works at 10 minute intervals, so it can take between 1-9 minutes for your rules to be activated after you have saved them.
If you want your rules to be applied immediately, go to Diagnostics page, and type ' sweeper/test ' in the Diagnostics box, then click 'Run Diagnostic'.
If, despite a short wait or running 'sweeper/test', it's still not working then did you include a condition of any kind in the rule?
If you click on 'View Config' or 'Toggle raw display' in the sweeper file attached to your Radio Recordings folder, the code should read something like:
# Rename files
action {renamefile {%year %2digitmonth %2digitdate - title}}
If you have something different then post it up and we can troubleshoot more precisely.
You can also click on 'Test config' to see what would happen if the rule were applied, which might reveal to you the reason why it is not working.