IronPython cant read my PropertyControl value

Hey all, i have a IronPython script catch from here https://community.tibco.com/questions/how-showhide-columns-dynamically-table-visualization-spotfire, but this script doesn't read my propery control value, as you guys can see on the attachments.  

When my property control is active in "VENDA DE ATIVOS" value i need show the columns "COD, NOME". If i turn the propery control, which is a drop-down list, to "GREENLIST/SUCATA" i need to show "NOME, COD" (just examples), but IronPython cant read the values of my PropertyControl.

If i run the script like "Screenshot_15" he works fine.