Not obviously possible to help you with such a sparse description of your issue, which lacks fundamental data like:
- Which airport you use
- It's a 3rd party airport ? If yes, it's one bought on the Ms Marketplace ?
- Does the airport has jetways ? If yes, and if it's a 3rd party airport, have you Disabled it from the GSX Config panel using the "Disable 3rd party" button as you should have ?