Hi Marcolinop98,
As Raxit85 has pointed out, there might be an issue with your browser (or perhaps a firewall/antivirus program) that is keeping you from filling in the form. Just to confirm though; do you have an account set up at
www.mba.com yet or is that what you are trying to set up? The most direct solution would likely be to reach out to the Customer Support Team at
www.mba.com and see if the team can help you with this issue.
1) When are you planning to take the GMAT?
2) When are you planning to apply to Business School and what Schools are you planning to apply to?
GMAT assassins aren't born, they're made,
Rich