An other newby, an other blinky probem

Hello

I've been reading the posts for quite a while. I hoped that I can figure some stuff out by myself... that didn't happen.
I am trying to program an 18f452, with no luck do far. I have PBP, and a picstart+ programmer. Also, I used a bootloader from Martin Dubuc's site. (http://mdubuc.freeshell.org/) I insert the bootloader's hex file using the picstart+ in MPlab, then using the Colt bootloader to program the chip in the circuit. I can load the sample blink.hex file (Martins) no problem, and it works.
When I try to load the hex file generated by pbp, it doesn't.
I checked my .int files, and changed XT to HS, since I am using a 20MHz crystal. I chaned this at the programmer settings as well. I used the code for the blinking led from a book (PIC robotics), from the PBP manual, and from this site. I added the line: define loader_used 1, so the bootloader code is (or should be) protected.
Anyone would have any ideas what else should I try? I don't have much experience with programming or PICs.


thanks, and sorry for an other blinky problem
Attila

mmm, what if you skip the bootloader process and dump the PBP .Hex file directly to your PIC without the DEFINE BOOTLOADER_USED 1 ?

Did you also write at the top DEFINE OSC 20 ???

What about your code???

I did what you suggested and it worked! Thanks!
I still would like to figure it out why it didn't work with the bootloader. I would like to program the PIC in circuit without taking it out.

Here is the code I used:

define OSC 20 '20MHz crystal

loop:
high PORTB.1 'turn on LED on RB1
low PORTB.0 'turn off LED on RB0
Pause 1000 'wait 1 sec
low PORTB.1 'turn off LED on RB1
high PORTB.0 'turn on LED on RB0
pause 1000 'wait 1 sec
goto loop


thanks again
Attila