I created a little app on Heroku, and am trying to follow their directions for setting up a custom domain on Godaddy. I've created a CNAME for www, but I can't create one for @ (or mydomain.com. per their instructions.

I keep getting the error: 

```
ERROR - DNS Rules Violation, A record of a different type exists for this hostname, CNAME 
cannot be created for @

```

No matter which combination of dots and @'s I use. Anyone know how to add that cname with just the root domain and not the www?