Memory Leak

In my scene is more than 3000 objects without LogicBrick. When I pass(proceed) to other scene, memory (on 14Mb), necessary for operation of the program strongly grows. At several transitions all RAM eats.
I have idea: from memory old objects are not deleted, and add new. Somebody can explain a reason of this problem or prompt as delete all objects from memory in RealTime mode.
Thank all.