Why won't "Obtained From" drop down list work?

Discussion created by rgwozdz on Mar 3, 2011
Latest reply on Feb 12, 2014 by topomat
Hello -

I'm trying to set parameters for a script tool in 9.3 toolbox (using Arc 10). 
I want the parameter to be a "Field" data type, "obtained from" a Geodataset layer that has already been set as a parameter. However, the obtained from field remains blank - i.e., there is no dropdown list by which to point it other parameters.  I can't type anything in either.  This problem previously appeared in a 2009 thread (http://forums.esri.com/Thread.asp?c=93&f=993&t=289311) but the quick fix discovered there (set Multivalue to No) doesn't work for me - maybe an Arc10 issue?

Anyone have a fix or experience with this?