Ipcc exam registration

My coaching class people are telling me that some kind of a password is required which is sent by icai to me before they can do online registration on my behalf.The problem is that I have not received any password at all.I haven't changed my registered email id or my number.Another point is that all my friends are using the password that they got for may attempt where as i skipped may attempt due to personal problems(i did not even register for the exam& hence i did not receive any password).What should I do now? (apologies for the lengthy post)