Map crashes

yeah um when ever i start my map every 1 lags really bad then drops does any 1 know how to fix this...?

Give us more details about the map. Attaching it to the thread might also be a good idea.

I fixed it for a little wile, but now theres an error report when i try to open it I think its because i imported something and it messed it up.

If you do not give us more details, we will not be able to help with your other problem either.

Well I'v thought about it and it wasn't that great of the map, it was finish so I can still play it if i like. Thanks though :)