What I suggested there is how to display a value from the sesson in your qListForm since you haven't specified what you wanted to do.
Based on the error message you use qListform to Edit an existing list item and qListForm can't find the ID.
You need to pass in the url the ID of that item, something like this
…\..\Editform.aspx?ID=1
That would display the item with the ID 1 in the qListForm and allow you to edit it.
I think that using Link To properyty you can make it work.
Please check our documentation, it explains nice how to edit existing items, how to use the sesion, etc.
The above description of your scenario is not clear to me. A few screenshots would help.