Xara Web Designer is software which allows the user to graphically design web pages which are then exported from the program to become files like "index.html", which are the files which have to be uploaded to your host's server. I know of NO hosting company which will trouble-shoot or work with XARA or, indeed, any other "What You See Is What You Get" web creation software, they will work only with those exported files. It is always the web site creator's responsibility to ensure that his/her exported files "work" once uploaded to the hosting server.
So, exactly what problems are you experiencing with XWD?