Hello Dear,

Please mention more details of the course and institute in which you are applying for. You can try after few hour there might be a chance in congestion in network/Server. Application ID must be mentioned in your mail id. If you are having trouble logging in, you can write a mail to the help desk of the exam you are appearing for. the email id is mentioned on their official website. Please note that application ID is generated only when you have registered before. If you are a new user, then you need to register first and then proceed further.

Good Luck