IntelliJ IDEA: Python plugin does not highlight Python code

I have some problems whith IntelliJ IDEA Python plugin.

I've got a Java project with a few modules. And I want to add one module for Python tools-scripts which I use to generate some files.

I downloaded and installed Python plugin (version 2.6.6.) for my IDEA (10.0.2 Ultimate). Then I added Python SDK to the project and created new Python module. Then I added /src dir to this new module.

When I right-click on this module, I have a context menu item New -> Python file. I can add my .py file to my module. Also I can create Python Run/Debug Configuration. And IDEA can launch my script. But IDEA doesn't highlight Python syntax. It marks Python module with Python icon, but my Python file is marked as a text file.

I have inspected all settings, but I failed solving this problem. /src is marked as 'Source folder' in 'Project Structure' dialog.