Help Required in Programming Arduino UNO

[mfaseehuddin]

The system works fine, and the code is being uploaded to the Arduino. However, when I try to upload new hex file the code does not run on the Arduino.

For example, I program the Arduino with 500ms of flashing an LED the led flashes, and upload the same hex file the Arduino functions properly but when I upload a Hex with 50ms flashing of an LED the code flashes properly but the led does not blink. Could you please help me set this up.