Please note there have been alot of issues with software not working correctly the last few days and today. This is not down to the software itself but due to Betfair having difficulties with it’s site being attacked.
You can see the announcement here:
We're currently experiencing a DDOS attack on our site. Your funds are safe and secure. We're working to fix this as quickly as possible.
— Betfair Helpdesk (@BetfairHelpdesk) April 13, 2015