Tool (Simplify Polygon) parameter is not visiable any more.

[irfanlatif]

hi every body,

I am having a strange problem in ArcGIS Toolbox.

I am trying to use the Simplify Polygon tool from ArcToolbox. When i open the tool there is no possibility to input Simplification Tolerance. Please see the attached image.

I can run the tool as batch and from the python window with out any problem.

I am using ArcGIS 10(Editor) with Service Pack 5 on Windows 7 64Bit (English) and Windows Server 2008 64Bit (German). On both machine i have the same problem.

Any ideas.