Microsoft mystified!

Hello,

I have made a link to a .pps file in an html file.

When I use Internet Explorer (v7) and click on the link the PowerPoint
presentation runs fine within IE except the enter key (and the space
bar) are disabled.

Microsoft Tech Support have been looking into this with me for over a
week and cannot find out why this happens.

Incidentally 4 other people with different PC systems have tried the
presentation and have the same result.

I can move from page to page using the mouse click or the PgUp and
PgDn keys.

With Firefox I can use the enter key!

Anyone know why the enter key will not work with IE?

Cheers

Geoff

PS I was told about the http://www.pptfaq.com/FAQ00189.htm
info a while ago but couldn't find a reason why the enter key doesn't
work.