Seems it's reported as 'support broken' in ver 0.70.
No update yet for 0.72.
Also seems been working in ver 0.58
http://www.dosbox.com/comp_list.php?showID=388&letter=A
Maybe you should try an older version of dosbox?
They can be installed besides the latest version without interfering with each other.
BTW, if you try that, do NOT copy dosboxconfig cross versions, that won't work.
Maybe it's enough to get you through that specific game sequence.....?