LiquidCrystal complication with USB host

hello arduino masterer's

my group , new arduino, meeting obstacles. have connected arduino shield usb host our arduino uno (by attaching pins on arduino shield usb arduino holes). connect wires shown guide: http://arduino.cc/en/tutorial/liquidcrystal
to arduino shield connectors. when this, display cant show have coded properly. not simple "hello world" code. doing wrong, aren't sure is.
hope guys can help.
thanks in advance  

that shield uses spi bus communicate max3421e on shield.  uno pins 10, 11, 12, , 13 used communication can't use them lcd when using shield.

simply choose other unused i/o pins lcd , change constructor match pins chose.

code: [select]

//liquidcrystal lcd(rs, e, d4, d5, d6, d7);

liquidcrystal lcd(12, 11, 5, 4, 3, 2);      // put newly chosen pin numbers here

don

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