serial port with LCD chipsee 4.3

I have the BBBlack and the chipsee display 4.3" C5-BBB-EXP43
I have the WINCE OS working, it is in “bundle” in the chipsee CD.

I connected the UART2

To RS232 device.

On the BBB, i compiled an application that works on other windows mobile/CE devices with the serial port.
The same application is running on BBB with the 4.3" display
I set COM1, at 115200 (like the connected device) but i can not see data.

Can you help me ?