Hemant,
Previously when I've worked with a batch file I never launched it from the Application Modeller. I can't remember the reason why. However method below:
Key stroke 'Windows Key+R' (or just windows key if WIN7+) and send the path to the batch file via keystroke 'CTRL+V'
You should then be able to just attach to an 'already running' application.
Tom.
(thinking about it, It was probably over a citrix session, so I was forced run launch batch file in such a method)