Problems selfbooting

[LoPan]

i recently replaced the music adx's in a selfboot copy of MVC2 that i know
to work and when i try to make it selfboot again, i get as far as the SEGA logo,
then it kicks me back to the dreamcast screen. I assume this means that ip.bin
is loading, but 1st_read isn't. I have had the same results using the ESCHELON
method as well as the bin2boot method.

Is there some extra step i have to take since the bins are from a previously selfbooting game?

I can only assume that the problem is with the offset of my 1st_read.bin, but -msinfo spits out 11702, just like everyone says it should.

I am desperate, so if you don't help me, one of the hostages is going to get it!