If you were unable to lock your choices in Round 4 MDS counseling and it's still showing unlocked, you should contact the counseling authorities immediately.

There might be a technical glitch or a specific reason why you couldn't lock your choices. It's important to address this issue promptly to avoid losing your seat or facing any other consequences.

Here are some steps you can take:

1. Contact Counseling Authorities: Reach out to the relevant counseling authorities through their helpline, website, or email. Explain your situation and ask for assistance in locking your choices.
2. Check for Deadlines: Ensure that you are within the deadline for locking your choices. If the deadline has passed, you may need to explore other options or wait for the next round.
3. Technical Issues: If you suspect a technical issue, provide as much detail as possible to the authorities so they can troubleshoot the problem.

By taking these steps, you can hopefully resolve the issue and ensure that your choices are locked in for Round 4 MDS counseling.