calendar drop down boexes not appearing with timestamp fields

I'm having a problem with Instant Web Publishing, where my calendar drop down box isn’t appearing on the screen, but only when I am accessing the file through IWP.

I have a SQL backend database, where there are some date fields which are of a date/time data type (which means that in FileMaker these fields are automatically made to be of type timestamp). I have set up the layout so that these fields have a drop down calendar available, to make it easier for the users to enter the date in the correct format.

When I am in browse mode on FileMaker I am able to use and see the drop down calendar. However if I access the file through IWP, the drop down calendar doesn't show up, not in any mode, browse or find.

Originally I thought that IWP wasn't able to display the drop down calendars, but then I created a field, which is of type text and assigned it to have a drop down calendar box. When I opened the file through IWP, only THIS field’s drop down calendar showed up.

Is this a known problem? Is there a way of getting around it? I was thinking to try and change the data type that FileMaker sets up for date/time data types, so change it from being a timestamp to text... but it doesn’t let me change the data type

Any help would be very much appreciated

Regards

YKB