Dish 322 Local Channel Info Missing From Guide

[rvalip]

I am having a constant problem with my 322 receiver. It seems everyday after say 8 pm on one of the local channels in the guide, channel 57, everything says "no guide info" or something along those lines, I am then prompted to download the most current guide and it will and then fills it in. However, why does this keep happening and why only for this one channel? I turn the box off every night to let the guide download on it's own. Also, when downloading on it's on the guide only goes about 2 days out and always stops at 2:30pm, but when it makes me update it for the channel 57 info it extends the guide until 6:30 pm. Any thoughts on this? I also have a dvr box and that one is always fine. Do you think it's a bad box, bad lnf?