Hello,
There are several manufacturers of BASIC compilers for PIC. (There's Swordfish, Proton, MikroE, Melabs and so on).
I don't know for which one YOUR program is but as far as I can see it's not for any of the compilers being discussed on this forum, which is PBP (and to some degree the old PBC) from MicroEngineeringLabs.

Your best bet is to find a forum where the particular compiler you and your friend is trying to learn is being discussed. If that compiler IS PBP from Melabs then you ARE at the right place but the code you posted is not compatible.

/Henrik.