Compiler/MSP430G2553: MSP430 , LCD16x2 black squares

Part Number:MSP430G2553

Tool/software: TI C/C++ Compiler

Hello all,

I get black squares on the first row when display on LCD16x2 (RC1602B-FHY-CSVD) from MSP430g2553 (and some contrast less squares at second row).

I am beginner with this MC so i tried some codes from internet (on IAR). 

An example of code is from here:

karuppuswamy.com/.../

 I'm using a potentiometer for contrast. I tried with this configuration combination too :  28h, 0Ch, 03h, 01h, and still nothing.

Sorry for my expresion and thanks for answers(if there will be :) ).

Or if you have any ideea of code how can i configurate this...