Hi I was working with interfacing of lcd(JHD162a) 16*2 type with at89s52 micro controller. So I tried making program in keil c51 compiler. I compiled the code and generated hex file from it. I tested hex file in proteus simulator and it was running fine, lcd was showing data. I have 8051 Ide bought. It has a usb ISP programmer. But the IDE wont take the hex file. It does not load the hex file by only keil. It would load correctly the hex file of compiler microC pro of 8051 but it wont run on lcd.