Sorry, I cannot help you without more information. What version of FSX are you using? Which Windows OS version? What kind of joystick/throttle do you have? Do you have FSUIPC installed? Any other third-party addons? Etc.
Draken is self-contained and does not utilize FSUIPC or any other third-party software to communicate with FSX, so there should not be any conflict unless the Concorde-X installs something that changes the default behaviour of FSX. Try checking the install log (if there is one) and see what was installed with Concorde-X.
Win 10 Pro | P3D v4.5 | AMD Ryzen 3 3.5 GHz | 32 GB RAM | NVIDIA GT1030 | TM HOTAS Warthog | TM HOTAS Cougar