http://kb.adobe.com/selfservice/view...nalId=tn_15512
...
Loading large amounts of data
If the application loading large amounts of data (for example, 1000 records returned from a query,) consider the delivery mechanism. Most applications cannot usefully display a set of 1000 records in one view. Instead, load and display data in small chunks. This may solve a variety of problems in the application: overall performance, usability, and as a side benefit it avoids triggering the timeout alert.
Note: The number 1000 in this example is an arbitrary number. The maximum number of records allowed before this alert box appears depends on the amount of data in the XML file, the connection speed, and the speed of the client machine.
Examples:
Macromedia DataGrid Component
It's difficult to work with many records at once in the DataGrid.Pull in small chunks of data, about as much as can be efficiently displayed and used at once, and you should have improved results. 100 records at once could suit the DataGrid better than 1000, for example.
Loading Large XML Files
Loading excessively large XML files can cause the script timeout error.