SparkEdit Help Needed

[Jordie]

Ok,heres the problem;
I've rebuilt a map and added into it a hunter and elite,yet there is one slight problem.It lets me play on it i've made it so there is hunters in warthogs shooting at me and elites in the rocket hog shooting at me,also i've made MC's in ghosts.Now getting to the point the SparkEdit problem is that the rebuild bloodgulch won't open in SparkEdit.It just doesn't respond.Yet all the other maps open?I'm trying to make it so there is more warthogs and ghosts and rocket warthogs.

Help appreciated.