Jim,
Sometimes it is difficult to diagnose heli problems over the internet, but it sounds like something is amiss, either with a servo, or an adjustment. Sounds like you may need to adjust the swashplate and/or linkage...
Maybe take it back up to the hobby shop so they can take a look. The CX2 should hover effortlessly, when properly set up, hopefully, they can get you set up, assuming you bought it at a hobby shop?
In the meantime, here's probably MORE than you wanted to know about the little CX2!!!
http://www.heli-wiki.com/mediawiki/i..._and_CX2_Setup
Good luck, and I'm sure there will be more suggestions coming forward...
Glenn