We just finished a major upgrade of our accounting/inventory application. We have several custom designed reports that need to have fields that are defined as "string" changed to "number." These reports were designed by a consultant who is no longer available and the software vendor does not give support on custom designed reports. Per the upgrade dox, I need to use Field Explorer to edit the parameter fields on the reports to make these changes. The problem is that when I get to the Edit Parameter dialog, the Type: dropdown control is disabled, grayed out. How do I enable this control so that I can change field type?