Regarding Close Button

Dear Sir,

In my web appllcation using asp.net as front end and oracle as backend. This application is totally base on crystal report.
I have written the code for closing and disposing the report document in the session which close and dispose the rpt files in the temp folder. When I recycle the worker process the close button becomes very close or sometimes hangs. So, Please give me some suggestion regarding the close button. Is there any additional code inorder to make the performance of the worker process fast.