Atmel Studio Setup/uploading problems for Arduino Mega 2560

i have specific need use atmel studio various projects using arduino. 

i'm able program same ardunio using arduino compiler site, know hooked correctly , functions.

i followed video tutorial , installed atmel studio 6.2
https://www.youtube.com/watch?v=ppgdsrkzszs

i made adjustments mega 2560. (see below).

-cc:\users\walter\documents\arduino\libraries\bin\avrdude.conf  -patmega2560 -cwiring   -p\\.\com10  -b115200 -uflash:w:"$(projectdir)debug\$(itemfilename).hex":i

i able compile/build solution (the sample blinking led program)

i used external program created (in video) upload program arduino , tx/rx leds show program transferring. 

the problem is, nothing seems happen after this.  program doesn't seem running.

one thing noticed on tool bar above shows processor atmega328p instead of the
atmega2560 used arduino.  i've tried change appropriate mcu won't load.  don't know if problem or not. 

i've ordered uno , see if changing arduino fix problem.

any suggestions on fixing atmel studio problem appreciated.

thanks in advance.

 

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