From Bitsoup forum - fix for UK ISP problems

The Fix - Changing DNS server settings on Microsoft Windows 7

Go the Control Panel.
Click Network and Internet, then Network and Sharing Center, and click Change adapter settings.
Select the connection for which you want to configure Google Public DNS. For example:
To change the settings for an Ethernet connection, right-click Local Area Connection, and click Properties.
To change the settings for a wireless connection, right-click Wireless Network Connection, and click Properties.
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Select the Networking tab. Under This connection uses the following items, select Internet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6) and then click Properties.
Click Advanced and select the DNS tab. If there are any DNS server IP addresses listed there, write them down for future reference, and remove them from this window.
Click OK.
Select Use the following DNS server addresses. If there are any IP addresses listed in the Preferred DNS server or Alternate DNS server, write them down for future reference.
Replace those addresses with the IP addresses of the Google DNS servers:
For IPv4: 8.8.8.8 and/or 8.8.4.4.

On Mac

To enter a DNS server address and search domains:

Choose Apple menu > System Preferences, and then click Network.

Select the network connection service you want to use (such as AirPort or Ethernet, unless you named it something else) from the list, and then click Advanced.

Click DNS, and then click Add (+) at the bottom of the DNS Servers list. Enter the IPv4 or IPv6 address for the DNS server.

Click Add (+) at the bottom of the Search Domain list and enter the search domain, apple.com for example.

When you’re finished, click OK.
Make sure that you close your torrent client before you try the fix.

Might be a stupid question, but you are trying to access Bitsoup using https not http.