I created a thread for a new member having an issue.
Mindwizard: What's the name of the mod you think is causing the issue? In addition. . .
Please provide an in-depth explanation of the issue with the Undercity encounters, all mods you're using with the game (whether you think they may be related to your issue or not.) When listing the mods, include hyper-links to pages where one can download the mod. (You can't assume the folks that can help you with your issue have in depth knowledge of every mod out there.)