rosserial and wireless communication

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Hi,

I am using APC220 Radio Communication Module on my arduino atmega2560, in order to communicate with my computer wirelessly. i have written a simple publisher/subscriber node for my arduino using arduino ide and ros_lib, it's works fine using usb to serial cable, but when i'm using APC220(which is actually acts as an serial interface, conntected toRX/TX pins), i am getting following errors:

[ERROR] [WallTime: 1410187017.536715] Tried to publish before configured, topic id 125 
[ERROR] [WallTime: 1410187017.538328] Tried to publish before configured, topic id 125
[WARN] [WallTime: 1410187017.549967] Serial Port read returned short (expected 16 bytes, received 13 instead).
[WARN] [WallTime: 1410187017.550437] Serial Port read failure: 
[INFO] [WallTime: 1410187017.550810] Packet Failed :  Failed to read msg data
[INFO] [WallTime: 1410187017.551095] msg len is 16

I am almost sure about my hardware settings and baud rates, because it's works with a single publisher, my problem is a node with subscriber and publisher working simultaneously.

Is there any tips about using rosserial_arduino with wireless modules? Is there any body who has experienced APC220 modules with ROS and Arduino?