[Zope] Permissions problem

Hi all, I recently changed permissions on a folder. I change the View permission from allowing all access to allowing that of only Manager. When I access the contents of this folder while logged in as manager, some pages I can access OK. However, on others I get a log in prompt and if I hit cancel, I am told I "cannot access standard_html_header in this context." I thought this was due to proxy roles needing to be set on the page that is calling standard_html_header but after changing the proxy role for one of the pages in question, I still get the log in prompt. It has been a while since I have had this happen and am at a loss. Can anyone point me in the right direction? Thanks.