Raghu,
you have many things listed as potential problems in your server. One of them i will classify as major - you are running BBB version 1.1 which is is very old one. You need to check the documentation and install the latest version which is 2.2.3. It has many improvements and gets rid of the Flash client - it runs entirely on HTML5 which improves audio and video quality. It also removes the security issues that come with the flash client.
My advice is to consider the upgrade and not dig into old version issues. I doubt the dev team would advice differently.
If you have recordings in the old format you might need to upgrade them too. So please visit the docs, check the requirements, and upgrade your server.
Regards,
Peter