i have a dish 500 and coaxible cable -HD?

The 311 receiver is not a DVR or HDTV receiver. You will need one of the newer receivers and the Dish receivers do not accept cable input.
 
To be more specific. You will need one of the ViP series receivers (dunno why DVR was even brought into this, lol) and either a wing dish to hit either the 129 or 61.5 sats (depending on your location). Instead of a wing dish you can get a 1000.x dish for a single dish solution.
 

Charge backs

i have a 311 ? HD question