Communication during Mission Games

When I played a couple of Mission Games (Intermmediate and Advanced), there were two occasions when I though my "co-pilot" who was suppose to handle communication was drunk. For example:
Case whereby I was flying a commercial jet and I was getting close to the airport but failed to get orders from the co-pilot. So I decided to drop down to 3K feet and slowed down for the approach. Well my co-pilot said that I was too low and to get back up to 11K feet. Pressed Escape.
Case whereby I was going to taxi from the airport and the stupid co-pilot did not say anything the whole time although the briefing said he was suppose to handle communication.
Case where by I was flying at a certian ordered heading and all of a sudden I saw the course marker (top right icon) shift way to the left. The co-pilot said nothing so I did nothing. Then all of a sudden he jumps on me for being two way out of my heading.
Is the communication feature of the Missions consistently reliable, or this is an FSX problem.
Bubblehead
Case whereby I was flying a commercial jet and I was getting close to the airport but failed to get orders from the co-pilot. So I decided to drop down to 3K feet and slowed down for the approach. Well my co-pilot said that I was too low and to get back up to 11K feet. Pressed Escape.
Case whereby I was going to taxi from the airport and the stupid co-pilot did not say anything the whole time although the briefing said he was suppose to handle communication.
Case where by I was flying at a certian ordered heading and all of a sudden I saw the course marker (top right icon) shift way to the left. The co-pilot said nothing so I did nothing. Then all of a sudden he jumps on me for being two way out of my heading.
Is the communication feature of the Missions consistently reliable, or this is an FSX problem.
Bubblehead