working on redboard but not on uno r2 smd

i have a redboard and a arduino uno r2 smd. im trying to get wifly 171 rn-xv to work on a 2 channel xbee relay (SHD_RL01). this works fine on the redboard but on the arduino, i get setPrompt failed. any help would be great. thank you.

i know the uno r2 has a diffrent serial chip (8U2) vs the red’s ftdi…