log in problems with Internet Explorer

I am new to elgg.  I started a couple weeks ago with an installation of elgg 1.6.  I usually use firefox browser.  At my workplace I use Internet Explorer 7, I tried logging into my elgg 1.6 site and was able to log in but when I clicked on any link on the first page I was taken back to the log in page.  I have searched for an solution to fix this issue.  During the search I found a discussion that discussed this issue and the cause is related to the way IE7 stores cookies and submits both the http://www and http:// urls so the user is returned to the login page.  The discussion also stated there was a plug in to fix the problem and that it would be included in version 1.7. So, I updated to version 1.7 and have the same problem... even worse.  Now I don't even get to the first page, just returned to the login page. 

Does anyone have suggestions on fixing this issue?  The log in issue does not affect firefox and does not effect IE8 used on Vista.  I know everyone doesn't use IE7 but I don't want to limit access to my site just because someone is using IE7.

Thanks for any suggetsion.

Paul