xp modem drivers massive problems need help!!!!!

> Hi i have had this problem for a few months. I can't update any programs,
> or
> use programs like windows messenger and outlook express. Programs like
> kazza
> lite also don't work. Eventhough i have these internet problems i can
> still
> use internet explorer fine. I reformated my computer and reinstalled xp
> pro
> again but the problem remains. At the moment i have 2 operating systems
> installed (win98 & xp pro) on my computer and the win 98 is working fine.
> I
> can use windows messenger, kazza and outlook express fine eventhough that
> xp
> does not allow me.
>
> Is the problem that the modem isn't supported by xp?
> If so, y did it use to work?
> And y did it go wrong all of a sudden?
>
> Please reply.
>
> My computer is a P4 2.8ghz 512ram and my modem is a: D-link DFM-562IS HSFi
> PCI modem
>
> morgtom@hotmail.com