Not sure if this is an underneath zone, but two things here, one, you blitz a CB and leave the WR wide open, did this a bunch, bltizing the CB is fine, but you might want to go with a cover 1 or cover 0 so that the WR is covered and so is the TE. Also, man underneath is still better than zone
http://goallineblitz.com/game/replay.pl?game_id=232412&pbp_id=8074633On this one you should probably have someone play man on the TE
http://goallineblitz.com/game/replay.pl?game_id=232412&pbp_id=8075555Just a couple examples, but once a few plays go against you moral gets crushed and then even the good defenses get rolled...csull is the defense guy on the Dogs, but feel free to PM me with any thoughts.