Just call Dish and tell them you want to get a replacement remote. If you are still under the protection plan they may be able to send you another remote if the remote is defective.
If you are not under any types of warranty, Then ebay would be the cheapest.
To get it to "jive" with your DVR, It should already work with your DVR but if you meant VCR, Then press and hold the VCR button (clear button at the top) until the lights light up then press the up button repeatedly until the VCR turns off then press the pound # button.

I have a few extra 722 remotes laying around from upgrades if you can't find any.

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