mousePress crash 64 bit

My application is working fine on 32 bit, I am trying to run in 64 bit mfc application, GUI is launching, the model is also loaded but the moment I press left right or middle mouse it crashes. what all i need to change to run successfully in 64 bit machine.
The error I found in OnMouseActive() function, do i need to implement this function ? Pls help me. Thanks a lot in advance

After 138 posts you should know that such a post doesn't provide information enough for anybody to be able to help you. Nobody but you have the full code and obviously it has one or more bugs so go ahead and debug it.