Need more details on your situation to tell you one way or another. Are you on eastern arc? IF so they won't activate a 301 since it is mpeg 2. Is your account active or have you been disconnected due to non payment. Details are needed.
If you are on Western Arc just connect the 301 to the dish 500 and call DISH to activate the 301. If you have changed to Eastern Arc for HD you can talk to a CSR but probably can't get activation because 301 isn't MPEG 4 capable.