ArduinoDroide

Hallo

Hope that any one can help me, i have a arduino uno, and an Samsung galaxy tab S. I have downloaded the ArduinoDroid. But i cant get this program to downloade the sketch to the arduino i have a USB OTG cabel betwen the arduino and the tablet. I get an error mesaged: "avrdude stk500_recv() programmer is not responding". My best gues is that the baud rate is wrong, but i dont know how to change it. I can see that ther is a config file called avrdude.conf i am not able to finde this file. Hope that any one have had the same problem and know how to solve this problem.

Best regard David