I've managed to completely break simconnect so that it won't now operate over my network. Simconnect works fine on my Server machine and it has worked until I had an issue and thought to replace my version of simconnect.dll by deleting it and running the FSX Repair option. Shock horror when I discovered that all I had was the simconnect folder and dll for the SP1 file and not the earlier one. Is my best option to delete all the simconnect registry entries - uninstall FSX etc and reinstall please? My reason for asking is that have uninstalled FSX and removed all the 3rd party stuff, and reinstalled then SP1 - the original dll folder was not put into the C:\WINDOWS\WinSxS folder at all. Checking the registry I could see that the simconnect entries appear in 'pairs' one obviously for the new one and one for the older original version. I thought I'd cheat by copying the new version and used the entries in the registry to reconstruct the original folder - I also acquired a copy of the original dll file too. Sadly none of that worked for me. I'm not a techie - so any answers will need to be in simple terms please. Thanks in advance.