I have just installed Cubase SX on Windows XP and its working fine.

I install Reaktor, when I go to open it it gives me an error saying missing the file: WKWIN32.dll ???

I install Battery, when I go to open it it gives me an error saying missing the file: NIASIO.dll ???

I dont understand how this is possible as I just reinstalled a fresh copy of Windows XP Professional and I get such a problem like this? What coult it be? Any ideas?

Appreciate it, thanks.