Programing 328p chip with Parralax Serial LCD.

Hello i been trying to program this 328p chip with a Parralax 2x16 LCD i can normally program it with a Uno and works perfectly but when i try to program the 328p chip with the same sketch it Shows up with a bunch of junk letters, numbers and whatnot and i don't know what is wrong or how to fix it can someone Please help me?