Door doesn't slide

We sell a variety of single wheel patio door rollers like yours. You can see our full selection here. There's a good chance we have a match, but I can't tell what you have from these photos. I need to see the roller out and clearly shown without obstruction; more specifically, I have to see the back, top, and sides. Detailed dimensions will also be necessary. Please let me know if that would be possible.

In the case of some older aluminum doors, removal of the entire bottom rail of the door might be necessary. You can do this by removing all attachment screws, placing the door on a flat and stable surface, and then tapping the rail off with a mallet and block of wood.

Just note that this comes with a risk of damaging the glass if you tap with too much force. Just something to keep in mind.