, when using 5.1v everything went right so the lcd panel is working properly and the wiring is ok (i used the lcdcenter too and woks ok)the problem is that when chars appears are duplicated in scrolling several times and when not scrolling the appear in incorrect lines or the characters are wrong.
i test various configurations, settings the timing multiplier in other values but it goes worst.
i leave here some screens and the datasheet link,( also the manofacturer website):
Website http://www.powertip.com.tw/
datasheet:
http://www.powertip.com.tw/product/PC%2 ... 2004-A.PDF