For Bet Angel to function correctly it needs to take the current time and date from your PC.
Also, if you are using Windows XP then betfair require you to have installed XP Service Pack 3.
Check the time and date by double clicking on the clock in the bottom right hand corner of your Windows operating system. Also visit the Date, Time, Language and Regional Options in your control panel and check that the date and time is correctly formatted.
If you are using Windows XP then ensure you have installed XP Service Pack 3.