Very slow performance when scrolling through view object

Dear reader,
I've encountered the following problem (JDeveloper 9.03.2) I have a (predefined) ViewObject on top of a table, which contains ca. 3000 records.
The user is allowed to choose a record (for instance through a JUNavigationBar), as soon as 'last' record is clicked in the navigation bar, it takes minutes(!) before it is actually shown. It seems it is building up the entire ViewObject (in memory) with all the records initialized, until it finally reaches the last record. The same thing happens if I manually call:
vo.setRangeStart(3000), again it takes several minutes. The range size itself is 10. A call to vo.last() has the same effect as well.
Am I doing something wrong? And if so what? And if this is normal behavior, what can I do to improve the performance? It is impossible to work like this... Thank you for your time!
Regards Martijn

Need suggestions...
I have a jclient application that at one points does a batch download of data ~5k rows. Before I iterate through the records I call the setforwardOnly on the view object as well as its row set...
so something like
vo.getRowSet().setForwardOnly(true);
vo.setForwardOnly(true);
I only have read only access to these databases so I can't create temp tables on the database and I don't have any other database to point bc4j to to save the transaction information.
Is there a way to force it to use a file or anything else?
I don't want to turn off cacheing all together since there might be a case where user might accidently select a huge number of records to d/l.
I'm using jdev 9.0.3.2.

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