XP: Sometimes connecting to remote volume requires login as guest

[tgm1024]

Two machines:
Notebook's name: "calliope"
Desktop's name: "sazha"

I long ago made a local volume on my notebook "Y:" access the remote volume
"C:" on my desktop.

So on my notebook (calliope), perhaps half the time now whenever I
either
1. click on a shortcut to Y: (the remote access to \\sazha\c)
or
2. Use "Add Network Place" to access "\\sazha\c" I get a request to access
it as Calliope/Guest. WHY????? And why only SOME times?

http://i539.photobucket.com/albums/ff352/tgm1024/LoginToCalliopeasGUEST.png

Note in this picture that the title of the window says "connecting to
calliope" but within the window it says "connecting to sazha", and then asks
for a password.

Most of the time if I reboot both machines, this silly dialog goes away.
Not this time.

ALSO: I cannot use remote desktop from the notebook to the desktop when this
happens. The connecting window just flashes the connection dialog and then
vanishes without further info.

AND: When this happens I cannot print to the remote printer on the desktop.

Ideas?

 

[tgm1024]

Very sorry everyone. I totally botched the location of this post. I'm
reposting under general via direct usenet. I became confused by posting via
the microsoft HTTP interface.