there is no entry in available column list when trying to customize "affected objects" table view

[KG_11714884]

Version: Windchill 12.1

Use Case: there is no entry in available column list for soft type attribute when trying to customize "affected objects" table view

Description:

Create soft type attribute of type "Affected Activity Data".

In Affected Object Table of New Activity there is a OOTB disposition named "Finished", "Work-In-Progress", "Inventory". (These are attributes of type  "Affected Activity Data" only).

Instead of OOTB ones I want my soft type to show there. 

But while customizing table view I cant see the entry of these soft types in available column.

How do I add these attributes to the table..?

[avillanueva]

Something does not make sense since you should be seeing many more attributes available for selection on the left hand side. Can you show where you are selecting this table view customization from so we are clear?