Hi Mohit.

I would advise you to check whether you have filled the credentials correctly . Also please check once again if you are eligible for counseling or not. 

AIIMS, New Delhi has announced the result of mock round of AIIMS MBBS 2019 counselling on June 25, which can be downloaded from the link provided below. AIIMS MBBS 2019 counselling is being conducted in online mode only. The options for choice filling and locking for round one of seat allotment will be open from June 26 by 5:00 PM to June 27. Aspirants who could not register themselves for first round of AIIMS UG counselling can register through excercising and editing of choices. Candidates are required to use their login credentials ie., registration ID, RUC code, password and enter captcha code in order to participate in the counselling procedure.

For more insight regarding the same , use:

https://medicine.careers360.com/articles/aiims-mbbs-counselling/amp#referrer=https://www.google.com

Good luck!