User-Defined Report Header Variables Don't Show in PiWeb Designer

[[MJ...]]

We are implementing the use of PiWeb and need to add a custom header variable to the report. I have defined my variable under "Resources-Design Custom Report-Editor for User-Defined Report Header Variables" and mapped it to a K value. My variable appeared under "Select Report Header Parameters" and I checked the box under "Run" and "Measurement." Then I closed PiWeb Designer and reran my program. All of these actions were taken per instructions I found online.

When I go to PiWeb designer to add the variable to the header, my custom variables to not appear under "Variable-Data provider-Measurement" or any of the other drop downs. I am not sure where I am going wrong. Does anyone have any troubleshooting ideas I can try?