Hi Jyothrimai,
I don't know why this works - but it does:
In the library that holds your forms click Actions > Open in windows explorer. Watch all the InfoPath icons populate, once they all show scroll down and let those populate - repeat all the way through.
It's MUCH better than opening and saving each one (which will also trigger workflows)- the method above will not change the modified date or trigger the workflow.
***For some reason this method does not work on my Windows 7 PC with Office 2010 and IE9. It does work on my XP, Office 2007, IE8 machine. We have users on Windows 7 with IE8 and Office 2007 that it works on, but it doesn't work every time and
it doesn't always "refresh" all of the forms' properties. So, best experience is on an XP machine with Office 2007 or 2003. *Not sure if IE version makes a difference.