The DEFINEs don't match the comments. Might be the prob.

Defines show RS on PORTB.2, and Enable on PORTB.3

But, your comment says...
<pre>'This setup will tell PBP a 2-line LCD is connected in 4-bit mode with the data bus on the<br>'top 4 bits of PORTB, Register Select on PORTB.1, and Enable on PORTB.0.</pre>