Paging:
--> are you sure that the "show paging buttons" and "show control bar" properties of your datagrid are set to true?
No records:
-->
are you sure that the records are stored correctly?
Lets say you have a dataview "order" in which the "orderlines" datagrid is nested. The orderline-records will only be shown if the orderline_order relation is set for the Orderlins that must be shown.