hi there,
think the first question is if you actually have directX 9 installed. for some reason the game seems to require directX 9 as a baseline sometimes, you could try installing the libraries in addition manually.
Quoting from a different thread:
edit: repasting link cause in my settings at least the colors make it almost invisible:
http://filehippo.com/download_directx/
(and yes Stoner, I have you bookmarked in multiple places, thanks for being awesome)
that should allow you to change the directx version in options once you get to the character selection screen in DDo. Worth trying, posting if it worked or not, and then waiting for the people who are smarter than me