I've used LCDS with FB2/Flex SDK 2.0.1 hotfix 2 without issue.In fact, LCDS ships with the Flex SDK 2.0.1 hotfix 2, in C:\lcds\resources\flex_sdk if you used the default installation path.What specific issues are you having, and if you are not using the Flex SDK shipped with LCDS, have you made sure...