If it's a new key, it could be set to MDV mode, or Design Essential.  This cheaper, basic mode will only allow you to use very few catalogs.

If it's an existing key that suddenly changed, or if you paid for the full version of Design, simply contact Support and they'll send you an unlock code to fix your key.  If you only paid for the cheapest version of Design, you may have to spend a little more to get the full version.