The General forum is where users can discuss any topic regarding Motorola communications equipment - hardware, software, etc. There are also several focused forums on this board, so please take the time to ensure that your questions doesn't fall into one of those categories before posting here!
Your radio probably doesn't have the correct firmware required for the upgrade.
I don't remember if there is a way to tell by the model number, however, if you post that someone might be able to enlighten you on what would be required to do this.