The list of currently supported cameras by Aperture is here:
Apple - Aperture - Technical Specifications - RAW Support
And the subset available in Mountain Lion: OS X Mountain Lion: Supported digital camera RAW formats
I cannot find your camera on these lists. Your raw support version is the latest release, so there is nothing you can do about it, but wait, if and when the camera will be supported by Apple.
Try, if you can develope the raw with the software that came with your camera and convert it to TIFF or another lossless format, then import it to Aperture, or try, if the free Adobe - Adobe Camera Raw and DNG Converter : For Macintosh can develope them.
Added: Apple does not support all cameras, but will give priority to the cameras that most likely will be used by professionals. So it is a good idea to send feedback to Apple, to let them know that raw support for this camera is required. Use this form:
Apple - Aperture - Feedback