If you put your characters in peace mode, on normal setting (rather than aggressive) and ignore the hostile creature, does that help? Before talking to the imp, can you leave, clear the path to spot in the mushroom forest he leads you to (just south east of the eastern entrance), then return and talk to Tax?
What weapon do you have equipped for the DK? There is a potential crash problem when not using a sword;
Best game support on a game!! Ever!!
