Have you tried using it with
NullDC yet?
It may be that game is not compatible with Chankast or has issues.
Chankast has basically been dead for almost two years, with no News, updates or new versions, and has compatibility issues with a lot of games.
NullDC on the other hand is a new Dreamcast emulator, with much better compatibility and stability than Chankast and runs almost pretty much full speed on anything as good as a Pentium 4 @ 2.6 Ghz or better.
Although
NullDC is only on it's first realease 1.0.0 Beta 1, a lot of games that did not work or had problems in Chankast, now work in
NullDC. Even The problem with the Nvidia Bug that Sonic Adventure 2 had in Chankast, has been fixed and is now playable with
NullDC on Nvidia Cards.
But if you want to use Chankast, that is your choice and although I don't understand why you would want to you must have a reason oO. Hopefully someone Can post that can help you get you problem solved, as I have no Idea what your problem is or how to solve it
