Hi all

I constructed Easy-Downloader V2.0 for ATMEL 89C51/52/55 (http://chaokhun.kmitl.ac.th/~kswichit...easy2.htm) on my own. But I\'m facing a strange problem.i can write and read some HEX files but I\'m unable to write many other HEX files on to my 89c51 chip.I\'ve used different 89c51 chips but no use.While verifying i get error as \'Verify error !!!\' and on reading the chip i find nothing has been written.For some HEX files everything works fine.
Can someone please suggest what could be wrong with it ?

Thanking You

Regards
Bips