I've been trying to install MathCad 11 with Crossover Office Professionel 4.2... But it doesn't work... When It starts up the cd it gets to the menu where I have the option of installing MathCad 11, Internet Explorer 6 and Adobe Acrobat Reader (plus see some documentation I think)... I then press MathCad 11.. After this it takes some time, then I can kinda erase the window by running the cursor over it, reavealing another window, where I can press next... but after this.. the installer claims that I have an older version of MathCad installed and I can uninstall it by pressing a lille checkbox (which isn't there).. after this I try to press next but nothing happens.... I've tried this 3 times now... what's wrong?