Sorry, but what exactly does that mean? I'm new to arduino
Tell us how you are connecting the ST1149 board to your computer.
The example shows Ft232:
"We use FT232 program downloader(ST1125) connect the board
to the computer,the using software in the computer is as same as arduino uno.
Board PC
Vcc========== 5V DC
Gnd========== Gnd
RXD==========TXD
TXD==========RXD"
I am guessing you should connect the DTR lead from the FTDI Programmer to the DTR lead of the ST1149 board.
Check the PDF.