cannot upload my program to arduino uno I bought new Uno yesterday, i made my programme, and i compile it. it was good compiled. however, when i upload the programme to my Uno, it cannot be uploaded and there was a message like this

avrdude: stk500_getsync() attempt 10 of 10: not in sync: resp=0x1b 
Problem uploading to board.  See http://www.arduino.cc/en/Guide/Troubleshooting#upload for suggestions.

Help me please
Make sure u have selected the right COM port
Make sure nothing is connected to the pin 0 and 1 in arduino


This happens because the Arduino IDE could not find Arduino Board Connected to the system.