Why do I get "action canceled" or "page cannot be displayed" errors when I view the chm?
This often happens when you try to open a chm file that is located on a network share. One option is to copy the chm file to your local machine and open it from there.
If you want to open it from the share, read on:
This is happening because of a security patch issued by Microsoft. More info about the patches is available in these kb articles:
http://support.microsoft.com/kb/892675
http://support.microsoft.com/kb/896054
The problem can be fixed by adding some registry keys which are desribed in more detail in the kb articles above. To install the keys, follow these steps:
1. open notepad.exe and paste the regedit text below.
2. save as "workaround.reg" to your desktop.
3. close notepad and double-click on workaround.reg to install the registry keys
REGEDIT4
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp]
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x\HHRestrictions]
"MaxAllowedZone"=dword:00000001
"UrlAllowList"=""
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\HTMLHelp\1.x\ItssRestrictions]
"MaxAllowedZone"=dword:00000001
"UrlAllowList"=""
More info about chm display problems here:
http://www.helpscribble.com/chmnetwork.html
http://west-wind.com/weblog/posts/2928.aspx