hyperlinks to specific link don't work when published to html

I have a table of contents in excel where each line hyperlinks to a
specific sheet in another workbook. When I publish it ( i.e.convert to
html ) pressing the hyperlinks always gets me to the same sheet. How
can I get it to go to the correct sheet even after I publish it ?
(experts-exchange seems to have an answer but i can't afford the
membership)

I've been publishing by saving in the mhtml format.

THanks - Joe