Do you have a serial LCD Module ?
If you do not have a serial LCD, which is to say if it does not have an extra circuit board with a PIC or other controller you must use LCDOUT not serout.
Look at the diagram on page187 of Mr. Iovine's book and accompanying code.
Or page 96 of the MELABS p basic pro manual. The LCD unit with 16 pins or 14 pins on the non backlit units require extra circuitry, usually a PIC to work. The link I am providing is a source for one I have used to convert to serial use, however; this unit uses some Propriority commands which are available on his website, go and look at his links. http://www.wulfden.org/k107/index.shtml
Looking is free.