Problem with list of blocked addresses/masks in ESS4 using IE8

Earlyer i used ESS3 business edition. I used function http address management (list of blocked addresses/masks). In this "table" i wrote pages that i don't want users can access it e.g. *one.lt*. ESS3 worked fine. Then i updated to new version ESS4 it went wrong. I installed ESS4 and imported settings from ESS3 using setup import/export settings. All settings e.g. firewall and other rules imported successfully. But... when i open my default internet page www.google.lt i write in search field e.g one (as i later mentioned there is a phrase in blocked address list *one.lt* and it has to block web pages who has such a word). Google shows me results with keyword one. When i try to access first result page which is www.one.lt ESS4 block's it. And it is ok. But when i try to push Back button in Internet Explorer 8 browser it doesn't bring previous result. In ESS3 there where no problem with this. So i wanted to ask how can i fix this problem. How to make my browser bring back previuos results?