Even i am searching for the answer for the above question, Please somebody, if they know the solution , share it.
Thanks in advance.
It's really shocking to see that nobody has replied for a very important question that was posted way back in MARCH.
I'd answer if I could, but I can't.
These forums are "peer support". In reality, that means Infragistics staff may or may not respond to your post. The fact that nobody has replied usually indicates that the rest of us are equally clueless. (At least I am; I'm following your post because I'm interested, but ...)
If you need "official" support, they have a page where you can create a user support "incident", free of charge, at: http://devcenter.infragistics.com/Protected/SubmitSupportIssue.aspx
For best results, attach a working example of your problem, based on the Northwind database. That will usually get you a reply within a week.
The reply sometimes is "We have determined that this is a bug and we have reported it to the development team." In which case, the next hotfix may or may not include a fix to your problem.