The guide data is on 101, afaik, all standard receivers (i.e. D10, D11) get ~3 days of guide data, so if you have a standard receiver and since you state that you are only getting in a 'few days', that is normal, you can see this information yourself by going into Menu->Settings->Setup->Select Info & Test, scroll down to "Advanced Program Guide:" and see what it says, mine says "Yes, up to 3 days".
If you have a D* DVR, than you may have an issue, as I beleive they get a guide that goes out farther, in that case, I'd suggest a cold boot/reset on the receiver, also, check your signal levels on the 101.