From the error it would seem like in MSIE when connecting via the LAN,
the RMI address for Windchill is being resolved as 10.1.1.55 -- and that
this does not match where the applet believes it came from, thus causing
the communication to be rejected.
Why this address is being resolved this way in MSIE and apparently not
in Firefox is unclear.
[Note that there are plenty of good reasons, i.e. fixes, to move up to
the latest R9.1 MOR, currently M040, rather than sticking with F000,
though I don't have any firm reason to believe that this will help your
particular issue.]
--
Jess Holle