It's not easy to run µTorrent WebUI if you have dynamic IP!
Here is an easy guide how to fix that:

1. Go to https://www.no-ip.com/ and Sign up.
2. Login, and go to:
https://www.no-ip.com/members/dns/host.php
Then click "Add" under "Hosts / Redirects".

3. Use this settings:
Hostname: Your URL. Whatever you want.
Host Type: DNS Host (A)
IP Address:
- Then click "Create Host".

4. Download No-IP DUC here:
https://www.no-ip.com/downloads.php?page=win
- Install and configure (It's very easy)

5. Start uTorrent, and then go to your URL:
http://usernameassword@your_url.no...gui/index.html

Its really easy isnt it ?