Web shield problem

Build 1489.
As Web shield slows down my internet, big style (This has been muted elsewhere, befeore), I have set up scanning exclusions, to see if they would help. .
So, set up http://www.google.co.uk/ not to be scanned…lo and behold, on opening Google, then Web shield, last page scanned, yep, you guess right…http://www.google.co.uk/
In fact, all exclusions do not work, unless I am doing something totally wrong.
Turn off Web shield altogether and my internet ping drops from around 150 to around 45, downloads and uploads no change.
Any thoughts anyone?