Well I now have my app working under Wine. Had to dicth Kubuntu 9.04 as it was too unstable and kept on giving kernel panics and freezing. Now running Mandriva 2009 which has so fare been rock solid. Found the best combination was wine which comes with the distro 1.1.32 (I think) and winetricks to install vbrun6 and .net V3, these were the only two things I needed to get the apps working and the .net one accessing the internet OK. Stuart