Proportional Editing Locked Up?

Hi, guys. I am pretty new to Blender, so please excuse me if I use the wrong terms. I am working on a project, from a tutorial. When I press O to enable proportional editing, that seems to work. But the circle that (normally) you can change the size of when selecting the area that you want to edit (again, sorry if I am using the wrong terms) just seems to lock up. I see the circle, but I cannot change the size of it, to change the size of the area that I am editing. If anyone knows how to fix this, it would be greatly appreciated. Thanks.

Have you tried rolling the scroll wheel?

Yes, I did try that as soon as I turned proportional editing on…my issue is that when I scroll the weel, it does not change the ‘area of influence’.

On the header what is the ‘proportional size’ when you use proportional editing ?
Alternatively use page up/page down keys
Ensure you have not changed from the default key shortcuts

Please supply screenshots of the full user interface when using proportional editing