Jboss picking up old files

Hello,

We are facing strange problem with Jboss.
We have SSL installed on Jboss and do remote login on the server machine and start jboss console.
Everytime when we change the war file in deploy directory by copying pasting, Jboss server doesnot pick up the most recent file.
When we hit the website it shows the older files only.
How can we overcome this problem?

Thanks.