Why would it?
Anyway, some things to try:
Use /co 144.76.163.138 20189 in chat and see if it connects you to public server. If it does it's some kind of timing out when rerouting you, from what I last heard it is caused by weak internet connection.
Otherwise try downloading standalone 4.92 and seeing if it works. Otherwise make sure you run TB as administrator. Make sure your TB folder isn't set to read-only. Consider doing a reinstall. Afterwards if it doesn't help check these faq threads:
http://forum.toribash.com/showthread.php?t=455410
http://forum.toribash.com/showthread.php?t=214209
If all else fails, consider trying a VPN (e.g. hotspotshield).
Try to install standalone version. (Non-steam)
So we can see if it doesnt work cause of your pc or not.
You can download 4.93 from here
http://www.toribash.com/downloads.php
If it gives problem try 4.92
https://cache.toribash.com/Toribash-4.92-Setup.exe