Easy-Hide-IP is a server application that has to access the Internet in order to be able to perform the change IP. You have to allow access to the Internet the following applications:
EasyHideIP.exe
EasyHideIP-Server1.exe
EasyHideIP-Server2.exe
Use the Remember Settings options included in the firewalls in order to always allow this access – otherwise you have to use the Allow feature every time you change the IP address.
See an example - using Zone alarm