---
title: Why does my BrainMaster pass key for BioExplorer Enhanced not work?
description: "If BioExplorer is not accepting your BrainMaster Enhanced Passkey, check the following. - Make sure that you have selected the appropriate  COM Port and click on Set. - Then attempt to enter the passkey and serial number. - Check to…"
url: "https://brainmaster.com/kb-entry/id64/"
updated: "2025-12-10"
category: Frequently Asked Questions
---

# Why does my BrainMaster pass key for BioExplorer Enhanced not work?

If BioExplorer is not accepting your BrainMaster Enhanced Passkey, check the following.

- Make sure that you have selected the appropriate  COM Port and click on Set.
- Then attempt to enter the passkey and serial number.
- Check to make sure that your passkey is entered in the correct position. In BioExplorer the BrainMaster Passkey goes on top and the serial number on the bottom.