Why can't I use 'winreg' that is built into python for registry access from TestComplete?

I need to be able to read/write the registry, mostly just enumerate and read. I have great Python code that does this, same version as TC uses, but it won't work under TestComplete 12

trying to keep this as much python as possible, and, I feel I should be able to use every bit of Python, not just a subset if that is the case.

Any help will be appreciated.