Sometimes you have to disconnect and reconnect for it to really be charging. If it doesn't pop up with the android debugging, then it isn't really charging (of course, you have to have usb debugging on, but it is on by default). Also, AC chargers tend to work MUCH faster than connecting to the PC.
For those who are having stability issues, here is my MD5 for the 6/02 build:
Code:
d2ffe863839c66abc447682f03a57830 CM9-DX-06022012.zip
I recommend checking the md5 sum from the file on the sdcard, not just the file you downloaded.