Recording produces zero byte MPEG files for certain channels

[skhills]

I am using an OTA antenna with a Hauppauge 2250 dual tuner card. The channel scan using the "Map digital channels to EPG channels" button wasn't picking up some of the stations that I could get using the tuner card software, so I entered the Tuning Requests for those channels manually using the other channels as a reference.
Now I can watch all the manually entered channels in Live TV, but when I record on some of those channels, a zero byte .mpg file is produced.
I've checked that both tuners Tuning request fields match for those channels since it looks like tuner #2 is used by default for live TV, and tuner #1 is the default for recording.
I can record successfully from all other channels. Does anyone know of anything with the channel mappings that differs between live TV and recordings?

[whurlston]

Have you applied all the patches from the survival guide thread?

[skhills]

Thanks for your help! I had missed that last patch in the survival thread. With the file updates I was able to pick up the missing channels through the scan. I had one of the parameters in the Tuning Request incorrect since I just had to guess before.
Now the recordings for those channels are working, as well as Live TV.
The config app kept closing halfway through the scan, but I was able to pick up the new channels before it died. The scan crashing isn't a problem for me since I have all my channels now, but I thought I'd throw it out there in case anyone else sees the same thing.
Thanks for the quick responses in these forums!