Re: Seiki tv are not listed on your virgin remote codes list
I'm sorry to hear about this issue, as you've already tried Ernie's suggestion I'd recommend taking a look at some of the instructions [here] and follow the steps for the type of remote control you have.
There was a thread a few months ago with someone in the same position for TiVo, there are some good suggestions there (even know it's a different set top box) so you can give that a go to. You can find the thread [here].
Sorry again for the inconvenience this is causing, I'd love to hear how you get on.