0.63 is outdated for three years.
Each version of DOSBox has a number of compatibility fixes for known issues with games/software in the preceeding one - hence games that don't work so well (or at all) with an old version could run just fine if you use a newer one.
Both speed and stability of emulation has greatly improved since 0.63 as well, so I suggest you get a more up-to-date version (0.72 is the newest around).
__________________
"God. Can't you people see I'm trying to commit a crime against science and nature here?"
-- Reed Richards
|