If you don’t want to install SSL, follow the below steps.

  1. Open “CustomerAndOrdersManager.exe.config” file located in  “C:\Program Files (x86)\Microsoft Commerce Server 2007\Business User Applications” folder.
  2. AllowHTTP setting change the value from False to True.
  3. Try to connect again without HTTPS.

You can also setup the ssl. For IIS 6, you can use selfSSL (http://www.microsoft.com/technet/prodtechnol/WindowsServer2003/Library/IIS/993a8a36-5761-448f-889e-9ae58d072c09.mspx?mfr=true)