Add user defined attribute to model in Filter in ARIS 9

Hi,

I'm trying to add a new a user defined attribute to an EPC model in ARIS 9.  I go to Administration->Configuration->Method->Attribute types.  Then I click on New, select Integer type, language - US English & "custom" for the name and click finish(no need for other screens).  I'm now able to find the new user defined attribute in the attribute type list.

When I go to Administration->Configuration->Conventions->Filter and modify a user defined filter, I am unable to see the new user defined attribute in section 11. to select the attributes to assign to a specific model type.

Does anyone know what step I'm missing to see the new attribute in the model attributes section when modifying the filter?

Thanks for your help