As I said before.... You have the strategy I uploaded right? Open the strategy in Visual JForex and try to upload it to contest. Does that work ? That is all I did. The strategy works just fine in historical test, and on live but I can't upload it to contest because I get that pesky error. Anything you need to know is in the strategy. I have some knowledge about programming and how softwares work and I believe the problem is with VJFx. I am using Windows 7 64 bit (maybe that helps you more).