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Based on the situation you describe, we will be more than willing to assist you. Even though both of your Slingboxes are out of the 90 days, we will help you out in order to fix this issue because you purchased the Registration Key less than 90 days ago.
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Finally, we encourage you to give us a call as soon as possible. Our contact phone number is 1-877-GO-SLING (877-467-5464).
The Slingbox Answers Forum Moderation Team.