RESET problem

[prabira]

Hi !

Thanks to your help, my P89C51RD2HBP is now working. But the problem is that, once it's programmed, when I again try to take it into ISP mode(By resetting with PSEN low), it fails to work again and the status bar of FlashMagic shows:'Attempting to Connect' . Also, when I'm pressing 'U', the Hyperterminal is not showing anything ( IC not responding ?). Please help !
prabira

[Andy Ayre]

Are you pulling P2.6 and P2.7 high when trying to enter ISP mode? If not you should be doing that.