I've already checked the common fixes for this, and i have the latest version of DCM as well as BTS and DirectX.

Whenever an amphibious invasion is attempted against one of my cities, or I attempt one against an enemy city the game crashes. This only occurs with dale's combat mod. Any suggestions?

Try posting in the thread for Dale's combat mod, because this forum is for more general Civ4 problems, not mod-specific issues.