Hi,
I think that you need to associate your CCO login to a company that it has any kind of contract with Cisco (Reseller, gold partner, silver partner).
If not, you can not access a lot of sites on Cisco web page, included the download area, but noramlly, in this area you can only dowload patches not the full versions of the software, for example Callmaanger or IPCC Express or Enterprise.
Hope this helps,
Juan Luis