Group Policy

I created a 2 GPO’s which are not working the way they are supposed to be.

1st GPO – Do not Allow Delete Browsing History
I have set all the things right, but for some reason both IE7 and IE6 can still delete entries from or all of their browsing history. And I really don’t want them doing that.

2nd GPO – Browsing Whitelist
This one is definitely set properly as on IE6 it works, but on IE7 it’s not working. Apart from that, I need to set the GPO in such a way that if I select www.techrepublic.com for example, people can even view www.techrepublic.com/something.html How do I do that?

I tried gpresult.exe on all PC’s to make sure that each PC is getting the GPO’s, and all PC’s have them.

Someone has any idea of what’s going on?

Thanks