Games of ps1 jap that the chip not load.

Hello I've a little a little problem I have the matrix about two years, and I have updated the firmware to the last version, but are two games that the chip don't recognize and don't load, one is "Bust a Move2 dance tengoku mix" japanese version, and the other is Rival schools 2 japanese version, the two games pases the ps1 logo and then stops, I have tried the fast loading (presing select) and force ps1 (pressing de circle button), but they don't work, my ps2 is a pal version there is a way to make em work.

Thanks.