Refine edges - changes don't happen. Can anybody help?

[Falkoner]

When I am using refine edges (expand or erase) in Photoshop Elements it intially looks like it works (selection gets bigger or smaller as I paint) but after a few seconds my changes don't have effect anymore. Can anybody help?

[Akash Sharma]

Moved to Photoshop Elements​

[Medha_Sharma]

Hello,

Please have a look at this video once.

Use the Refine Selection brush |

If you have any further questions, feel free to reach out to me.

Thanks,

Medha