konqueror file opening question

[joe at actionline.com]

I have an html menu that links to a series of other html documents
that has worked fine for years.  However, when I switched from
PCLinux to Kubuntu and Linux Mint recently, konqueror no longer
works the way it previously did and I can't figure out why.

Within my html menu, I have some code like this small example:

<li><a href=file:/home/user/menu/option1.htm>option1</a>
<li><a href=file:/home/user/menu/option2.htm>option3</a>
<li><a href=file:/home/user/menu/option3.htm>option3</a>

This used to work so that when I clicked on option1, 2, or 3
the corresponding html page would open.  But now, instead of
opening the code, konqueror displays the source code for each option.

What do I need to do to get konqueror to work the way it previously
did?