Locking Problem when calling Transaction from inside the web dynpro application

Hello  Experts,

Need your help.

I am facing a locking problem in my web dynpro application.

I am calling the  Transaction CU60 from a custom button added in my application.

If the user closes the browser directly when inside the CU60 transaction , the table gets locked.

Users are asked to use the 'EXIT' button of CU60 tcode, but somethimes they directly close the browser

and consequently the table in CU60 becomes locked.

Thanks

Adam Saikia