Mac Forum / Applications / Media Player / June 2005

I can not get my AT&T CallVantage voice mail to play in Safari.  It used to,
but quit even prior to Tiger.
Their support people say that they ony support Windows Media Player, however
when I try to play any saved files with it, I get a " the files are not in
the proper format message."  The files play  fine as an email attachment; I
get a player control in the body of the message and the message plays when I
click on the play button.
The file icon looks like an iTunes file for what that is worth.

Any ideas as to what is going on?
Thanks,
trav