Previous&Next button not appearing in Master/Detail form

Hi,
I have a master/detail form.I published it as a portlet .
When I run it as a portlet or in a page..I am NOT seeing PREVIOUS and NEXT button
I see the two buttons in edit mode for both Master & Detail Block.
Even I changed the number of detail rows to display from 5 to 10..still don't
see the buttons.
Any help is greatly appreciated
Thanks
Babu

Hi Shiladitya ,
What you said is correct.I am displaying just 5 Detail Rows.I entered 5 rows...after
that I changed the to changed to display only 2 rows.Now I see Previous and Next button after I queried.
If the user wants to enter more 5 lines for the same Master record...you know how do I that ?
Is there anyway to get more lines. ?
Thanks in Advance
Babu

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