I have just 'discovered' Xara and find it to be a wonderful program. I, however, had the same problem as Juan, importing drawings for rendering, this time from Autosketch. Gary gave the clue about filled shapes. I find that if each area of a CAD drawing is first filled with a separate colour and then imported into Xara the problem of being unable to fill goes away.
The only problem I now have is that the imported drawing (wmf) is now about 25 times as large as it should be and has to be reduced accordingly. Any ideas? Am I missing something very basic? Thanks in advance