Connection failure between flash and arduino

i am doing a simple project whereby using flash to switch on the LEDs through arduino.

but there is a problem. i am able to switch on the led in the 1st frame with no error but when i switch next frames of the flash project, i will get this message "Connection failed! you must launch the serialProxy first".

i'm using tinkerproxy by the way.

how do i solve this problem? :-[