That is the only one?
You have a, wait a minute, the C-audio PCI is just software? I thought you had a separate soundcard. Hmm. DirectX is going to make your world suck hard...
I have not much experience without using external soundcards, but I hear ASIO4All is a fairly good option for some. It is a free download. Other than that, I have no other advice, other than purchasing a USB interface (replaces your internal piece of crap). Lexicon Alpha is probably the cheapest ($60).
Where are you Crow?