Self-compiled mapthis cannot be started

I compiled mapthis 0.52 with devkitPSP, and obtained two files "sioprx.prx" and "EBOOT.PBP". However, the self-compiled version cannot be launched in my PSP (3.71 m33). The error code is 0x80020148.

1) the pre-compiled version (under FW3.XX/mapViewer) works on my PSP. I just replaced "sioprx.prx" and "EBOOT.PBP" with mine.
2) I also compiled several samples in the SDK. They works well on my PSP.
3) I have tried to set PSP_FW_VERSION=371. It still does not work.

Is there anybody know the cause of the problem?

Thanks!

http://en.wikibooks.org/wiki/Map_Thi...ng_Map_This.21, first question.

You could take a look at the Makefile for my version, it contains directives for both FW3+ and FW1.5.

Thanks a lot Nieko. I have already tried to compile mapthis for FW 3.xx. I uncommented following two lines in the Makefile:

PSP_FW_VERSION=371
BUILD_PRX = 1

After I copied the new EBOOT.PBP and sioprx.prx into PSP, things did not change much, just a different error number: 0x800200D9.

I checked the Makefile and main.c and felt a little confusing. To use HOLUX GPS, I need to set macro GENERIC. But once GENERIC is set, the following setting will be invoked in main.c

PSP_MODULE_INFO("MapThis!", 0x1000, 1, 1);
PSP_MAIN_THREAD_ATTR(0);

I read a post from ps2dev.org, and it said that for FW 3.xx, the second parameter in PSP_MODULE_INFO must be zero (user mode problem).

It's been quite a while since I last worked on Map This!, so I don't quite remember all the details...

I do know someone else posted about this a while ago, you could search for the thread. It was also about using the latest PSPSDK/toolchain from SVN, that did the trick then (and for me, last year).