First, be sure you use ONLY GSX to call for SODE on a specific session, or use ONLY SODE. It's best and easier if you use only GSX, because GSX will communicate both the stand and the precise coordinates of the door to SODE.
If you do something like docking the jetway using the SODE menu, then undock them with GSX, it will not work, since there's currently no synchronization of the current jetway status between the two so, if you began a jetway operation with GSX, you should finish it with GSX, and if you began it with SODE, you must finish it with SODE. We are discussing with Jeffrey (SODE author) to add this feature, so this won't be a problem anymore in the future.
I just purchased FLIGHTBEAM STUDIOS KSFOHD that uses SODE and when I try to operate the jetways GSX says SODE is unavailable, jetways will not animate.
Does the same jetway, with the same airplane in the same position animate if you use only the SODE menu to dock it ?
Is the GSX configuration for that airplane correct ? A difference between calling SODE from GSX and calling SODE directly, is that if you call it from GSX, the data about the airplane door will come from the GSX configuration, which is usually more precise, assuming the configuration is correct in the first place.