Ah! the same problem I have been encountering!
My Intel based MacBook Pro 2.4 with OS 10.5.7 will not run Cosetup and after a manual install (using the packages) the utility fails immediately.
While the install runs on my PPC G4 system there also has connection problems. My real concern is the MacBook Pro.
D-Link Customer Support has been very responsive but unsuccessful in diagnosing the problem. We have uninstalled, reinstalled, downloaded again, installed again, all without success.
Are there any software interactions that cause problems?? I use Parallels to run Windows XP (needed for work) and Linux (for one utility). Might that cause a conflict??
When is the next release???
The last communication from Customer Support wants me to call a "live" support person. I will pursue that this evening after removing all the sofware, reinstalling the 1.11 firmware in the DIR-825, and then reinstalling the utility on the G4 and then try the MacBook Pro again.
As always any assistance is greatly appreciated.