When you call:
import module
Python will search the system path for either module.py or module.dll. You don't have to specify what kind of module it is when you import it.
Either way, from the information you provided, it seems that the module is being imported fine. The problem seems to be that one of its functions is failing. Are you sure that the module does not depend on any 3rd party DLLs that might have gone missing on your system?
Also, to be sure that you are using the correct module, execute the following code immediately after importing the capture module:
Code:
print capture.__file__
This will print the path of the module.