Hello Claudia,
I'm a real beginner with CAT tools (never even tried it yet but very
eager to move ahead). Concerning the problem you described, I think
that others encounter it also, you can check at
proz.com, there's a
group for Wordfast users. I'm sorry for not posting the exact link,
but I have read so much about CAT tools these last days...
What I understand is that it might be better for now to work with
Wordfast Classic and Word 2004.
Nathalie