Deepak,
I found the following info while reading through the net,
1) Ajax handles only text as response (which explains why my call to the livecycle process though invokes the service, gets to the error function as my returned data is a binary file)
2) Now that Ajax call is out of the equation, I have to stick with the AEM Livecycle connector to get my job done.
Now that I know which direction to go, I have a few things to be understood before I take the leap.The call on submit action on AEM forms is directed to the submit call in the GuideBridge.js, having said that I wish to understand how the call is propagated from the submit function in GuideBridge.js to the Livecycle process invocation incase the author of the form has selected the submit action to be "Submit to Workflow".
Regards -
Ashok D