processing time, uLCD-70DT, genieArduino

Hi,

does anyone know why the following line of command needs 1,07 second to process??

genie.WriteObject(GENIE_OBJ_LED_DIGITS, 1, Watt);

I´m sending data via serial communication from my Arduino(mega) to the uLCD and this line brutally slowes my programm down.

Thanks for any advise?

Cheers

Florian