Hi Craig and Jeff, Thanks for the input, I think I have found the solution. Firstly I tried Craig's suggestion and loaded a stock Boeing 737, recorded three different flights and put them together , you can see the result here: http://www.youtube.c...h?v=dMePdSLXlyY Secondly I Googled the problem and found the answer on a forum that I already belong to : http://social.answer...42-146414087ec5 it seems that the problem is rife. In essence, it's all to do with uiautomationcore.dll which is found in C:\Windows\System32 & C:\Windows\SysWOW64 All you do is delete these two .dll's (I just renamed them .dlx just in case it all went ** up) and so far it has worked, I tried recording some third-party aircraft and hey presto! I also found a useful little app for changing permissions on files if cant delete them http://www.askvg.com...-windows-vista/Regards,Mike