Before doing anything further, make a copy of your scripts or any file you change.
What do you mean by 'room management'? You mean having @ op status? You're saying you made changes in multiple script files, and you want us to tell you which one you made the mistake in? Are these channel names? because those usually begin with a "#"
If you change everything back to the original name, do you have 'room management' back again?
If room management involves the network granting you @op status, there may be an access list for a new channel which you haven't been added to a list.
If room management involves right-clicking on the nicklist, it's possible for those controls to be in one of your scriptfiles or in popups.ini, which hasn't been changed correctly.
If room management includes something in address-book, you might need to edit one of the menu interfaces which causes control.ini to change. Don't assume that editing one of the .ini's like mirc.ini or control.ini is something you should be doing. Maybe do a text search in the mirc.ini's folder and subfolders beneath it for files containing the old name.
You might need to add more detail to your question.