HtmlHelpController problem

Hi folks.

I have an odd thing happening with my htmlhelpcontroller. I've been 
updating the html help files for my software project and yesterday 
everything was working fine. Today ... not fine. Opening the help window 
from my program shows nothing at all in the help window. I have only 
been working on the html files, not the perl code. What I do is edit the 
html files and then zip them up into a help file. The program then uses 
the zip file:

sub Help {

     $window->{html_help}->AddBook( $ProgramPath."help.zip", $false );
     $window->{html_help}->DisplayContents;

}

It seems to have something to do with the zip file since I can resurrect 
an old help.zip file from a previous version of the program and use it 
with no problems.

Has anyone seen this before and if so, what is the "fix"?


Keith