Decision Calculations (3 levels deep)

Hello

I have a need where I need to create a decision in my process that goes through a collection which has a reference list which has a boolean value.  the only way I can pick up the boolean value is to create a calculation:

import System

static def GetAttributeValue(Incident):

Value = 'False'

if Incident.Resolutions.Latest()._ResolutionType._CreateProblem == 'True' : return 'True'

return Value

I thought this worked, however after testing.. it doesn't.  Any ideas

Thoughts appreciated.