I was thinking the same thing. But if you have tried downloading 3 different clients, sounds like you may be using off-site websites.
Here is the Official client page if you need it:
http://turbine.fuzeqna.com/ddo.suppo...4761&catID1=13
Uninstall what you already have. Make sure that all the files in the DDO folder are deleted after uninstall if the uninstall left the folder. Then try installing this client and patch.
I would suggest NO ONE send him your file until a DEV or MOD reads these threads.