Seems you also installed the
experimental/prototype(?) "DivX Media Format filters"-bundle from
DivX-Labs, which presently seems to only support Windows Media Player and further has "intermittent instability issues"!! (See DivX-Labs or
this info.) [I assume you're running WinXP? It seems to be a pre-DivX6 package (with its own accompanying DivX-codec); what DivX-version did you install?]
I would personally
uninstall it! Alternatively see what happens if you blacklist "DivXMedia.ax" (DivX Media Filters) in BSPlayer under:
(rightclick >) Options > Preferences > Filter management > Blacklist/Whitelist?