Getting an 'exportfs -rav': "Invalid argument" error on root dir

[mikenowo]

ON my computer 'fire' the contents of my
exports file when I "cat /etc/exports" is:

/ ice(rw,no_root_squash,sync)
/c ice(rw,no_root_squash,sync)
/d ice(rw,no_root_squash,sync)


When I try to do a
"exportfs -rav"
I get:

exporting ice:/d
exporting ice:/c
exporting ice:/
reexporting ice:/d to kernel
reexporting ice:/c to kernel
exporting ice:/ to kernel
ice:/: Invalid argument

-Why do I get a "ice:/: Invalid argument" error? Why won't it mount the root dir?

--

Then, when I try to mount from the other computer "ice" with:

mount fire:/ /fire
mount fire:/c /fire/c
mount fire:/d /fire/d

I get:

mount: fire:/ failed, reason given by server: Permission denied

--

The "/fire/c" and "/fire/d" mount fine and I can read them BUT the root
"/fire/" won't mount (which I attribute to the initial 'exportfs' error).

What can be causing this?