white screen : 2.8" TFT LCD Screen Module: HY-280TFT

hello everybody
i have a problem with my 2.8" TFT LCD Screen Module HY-280TFT
i connect it with an Arduino Uno board like this way Connect HY-TFT280 to Arduino UNO
LEDA -> 5V
LEDK -> GND
VCC -> 5V
RD -> 3.3V
GND -> GND
DB0->DB5 to D8->D13
DB6->A0
DB7->A1
DB10->DB17 to D0->D7
RSET->A2
CS->A3
WR->A4
RS->A5

details : here

i download and install the new library : UTFT. then i test the example : Arduino(AVR)->UTF_Demo_320x240 , but i alway have a white screen.
In the code, i change

UTFT myGLCD(ITDB32WD,38,39,40,41);

by

UTFT myGLCD(ITDB32WD,A5,A4,A3,A2);

; but i still have the white screen

please what can be the problem? thank you