yep Ocker you are correct, it is the backslash. Leaf, drop the backslash, and use an underscore or similar.
To change your name now, if you haven t already figured it out, simply open any of these pages, and providing you have signed into your hotmail/msn passport, click on your name (above right) then 'edit my profile'
I had a similar problem once, trying to change my name for a chat, one night. I think it is MSN being a little more strict to how they used to be, another example is my name. It was actually typed with
alt-0160 spaces(ie allowing the spaces to be shown, as well as my full name in an MSN chat room, whereas it would only show Carrot, if the space bar was used).
Alt-0160 doesn t appear to work any longer
(hope that made sense lol)