Cascading Parameter issue with RS2005... It worked in RS2000

Our company is attempting to convert several RS2000 reports to RS2005. We have 4 default parameters on every report.

1) Date Range (dropdown) – populated via Non-Queried Available values (Ex. Today, Week to Date, Month to Date, Fiscal Period)
2) Fiscal Period (cascading dropdown) – populated via Query Available values (if Date Range = ‘Fiscal Period’, select the last 24 fiscal months, else select Date Range value)
3) Start Date (cascading textbox) – populated via Query Default values (depending on Fiscal Period value calculate Start Date)
4) End Date (cascading textbox) – populated via Query Default values (depending on Fiscal Period value calculate End Date)

The user starts by selecting a Date Range which auto populates the Fiscal Period the auto populates the 2 Date textboxes. This works great in RS2000; however it’s not 100% in RS2005. Here’s what happens:

If a user selects ‘Today’ or ‘Month to Date’ in Date Range, everything works fine. At this point there is only 1 value in Fiscal Period dropdown. If the user selects ‘Fiscal Period’ in the Date Range, the Fiscal Period is populated with 24 values (1 for the last 24 fiscal months) and is set to the top value (June – 2006). The 2 Date textboxes are also populated correctly.

The problem is when the user changes the value in the Fiscal Period dropdown. Let's say the pick 'Mar - 2004'. The 2 Date fields are not refreshed or updated. If the user changes the selection back in the first dropdown (Date Range), everything is refreshed and updated appropriately. I don’t under stand why the first dropdown will refresh all the dependent parameters but the second dropdown won’t refresh the 2 Date fields below it?

Any input would be very helpful. I’ve tested this on 3 different development boxes and 2 different RS2005 servers. All tests had the same results.

Thanks,
Nick

Any ideas why this thing works in RS2000, but not in RS2005? Any input would be valued. Thanks,

Nick