Thank's ! Of course, You are right ! So simple solution...Great !
Code:
Lcd_Clear:
For cursor = 0 to 5
	PosX=0:PosY=Cursor:Gosub Lcd_GotoXY
	High Lcd_DC

	For i= 1 to 84
      	Lcd_Data=0:Gosub Lcd_SentByte
      	Lcd_Data=0:Gosub Lcd_SentByte
	Next i
Next cursor
Return