Email Link error

If there is a topic in my Forum which I want to bring to the attention of Members I quite often send the email to a larger Group via Outlook.

I go to the Forum/and or Topic via Firefox and then copy the full url from the address box.  I then transfer this to the email and then send the email.

However,  when the link on the email is clicked by the recipient a page appears with the following:

Sorry, only members with sufficient permission can access this page.

It doesn't matter if the recipient is already logged on.  I have the Topic/Forum set for ALL USERS to be able to read and access it.  Even me, as Administrator, cannot access the page from an email link.  However if I copy the link from the email to the address field of IE and/or Firefox - the link works fine and the page opens as expected!

Is this a glitch or do I have a problem that I wasn't aware of?

When I copy the link (from an email that I've sent to myself) and then paste it into the address field of IE or Firefox - the link loads perfectly.

The link appears to want to load up correctly - it just appears that 'Web Wiz Forum' ignores the 'logged on' cookie if the page is loaded via a link embedded in an email.