your neogeo.c is dated ahead of time... this is the problem with mameplus's v0.101 if i remembered it correctly...
to fix this, just correct the modiffied time for the file (edit it or something)
if u use 0.101 src, keep it like this:
ROM_REGION( 0x1000000, REGION_SOUND1, ROMREGION_SOUNDONLY )
if u use 0.102 src, change it to this:
ROM_REGION( 0x1000000, REGION_SOUND1, 0)
also, u must add a new line at the end of the neogeo.c file... just press 'enter' after the end of src to make a new line