Question : Is the Caller ID feature of the Dish Network VIP722 DVR not compatible with Digium TDM400P?

I recently switched from Cable TV to Dish Network and one of the attractive features was the inbound caller ID on the screen on inbound calls.  It's not working, however, and I was wondering if it's because the Dish Network set top boxes aren't compatible with my phone service: VoIP with Asterisk and Digium's TDM400P FXS card.  

Caller ID is received on my analog phones connected to the Digium port AND caller ID is received on my Cisco 7940 IP Phone through the same Asterisk server.  The caller ID is "Enabled" in the set top box.

Answer : Is the Caller ID feature of the Dish Network VIP722 DVR not compatible with Digium TDM400P?

You will need to ask tech support if callerid information is also passed onto the analogue phone plugged into the device. i.e if the analogue phone supports callerid will it also show the number on the display.
If it does then asterisk will be able to use it and it is just a configuration issue in order to get it working.