The file PMDG_SimConnect_LDR.DLL causes a lot of trouble in my system. Everytime I start the 744X Loadmanager or when I start the FSX I get the virus warning. (Trojaner TR/PSW.Online.BX.15) I am using AntiVir.If I ignore the warning I can start the 744. (I normally never ignore such warnings!!)When I try my F1ATR 72-500, it crashes and the message appears that I should send the information to Microsoft.I don't know, what the above mentioned file is doing, but it seems to coordinate gauges and interfers with other programms. After long time of testing i find it interfers also with ASX and Xgauge from HiFi Sim and as mentioned with F1 ATR 72-500.In the moment I have to make the decision, if I want to fly other add - on aircrafts I would have to deinstall 744X first, That can not be the solution.What can I do?RegardsMichael KielI am using Windows XP professional, with Athlon X64 5200 and Geforce 7550 GT

The virus warning is just that, a possible virus warning only. Your virus checker doesn`t understand the file structure or purpose of that file so it tells you their could be a possible problem. I use Avast antivirus, a free download, and this doesn`t have a problem.Reider

Thanks for your comment,the virus warning can be ignored but I still have the problem with the interference with programs like F1ATR 72-500 and ASX and the following CTD.RegardsMichael