How to remove a model patio door?
I'm not sure what model door you have, but I can tell you that in some cases the vinyl stationary door is part of the main frame and cannot be removed. If you need to replace the roller in your sliding door, see if you can lift the sliding door off the track from the inside.
Any other suggestions?
Did you remove all the brackets holding the stationary door (assuming it is the type that can be removed), the track inserts? They must be removed before the doors can be removed. Some vinyl patio doors have stationary doors that are part of the frame. If that's the case, you won't be able to remove it. Take another look at the videos that show how to remove the patio doors from the main frame.