are you using python 2.5 (since it says so in your IDLE shell)? my wrapper needs python 2.6.

(unfortunately it would be a bit cumbersome to compile the wrapper for python 2.5 since it has to be compiled with the same visual c++ version the python dll got compiled with and i think for python 2.5 it was visual c++ 2005 which i don't really want to download and install.)

the other reason could be that your acknex.dll is missing in the directory.