Conversation so far:
Did something go wrong with communicating with the rover?
As of 2016, there has been no communication with the rover since Sol 2210 (March 22, 2010).
Did something happen to make the rover not communicate?
It is likely that Spirit experienced a low-power fault and had turned off all sub-systems.
How many times did they try to communicate with it?
Each sol, the Deep Space Network mission controllers sent a set of X-band "Sweep & Beep" commands.

Question: Did they give up on the rover?
Self-contained rewrite: Did the Deep Space Network mission controllers give up on the spirit rover?