What do you mean "Cant insert records"
are you getting any error?
Please check standard Sales Order page for reference
In reply to Mohana:
Did this suggestion help you? If yes please verify, if not, please elaborate with a few more details.
If nothing else, it's polite to come back and reply, when our members give you suggestions to your questions. And there's a nice function on the frontpage called My Forum Posts, where you can see all the questions you have been asking. If the status is not marked as solved, then please follow up, or let us know how you have solved the question. Just so that we can help the next user with the same question. Thank you in advance for your help.
Have a great day, Erik