Hi, my version of ZA is 7.0.470.000.Recenly I encountered blocking any access to internet zone when Internet Security Zone is set as high. If I set it to medium I do have full access to internet. My ISP gives me an external IP address through DHCP. What went wrong and what could be changed to gain internet access when security is set to high? Days before that, I had full access to Internet Zone when security was set to high. Did my ISP change something what I should discuss with them?

Operating System:Windows 2000 Pro
Software Version:7.0
Product Name:ZoneAlarm (Free)