sorry, they are 18F1320 chips.

Ive tested the programmer with other chips on different programs it it works, it just as soon as I program this program to a chip its stuck there for good. Ive fixed the program by re-enabling MCLR so that the programmer can stop the program.

But ive still got 3 PIC chips that have the un-fixed program and cant seem to clear them.

i'll have a look for the Midrange manual u mentioned