about report.rdlc in vb.net

hi,

i have created a report.rdlc in vb.net
i have created a table adapter which retrieves patient test reports in the following format

test_date test_name test_result

in a form,i binded report to a reportviewer control
everythinh is working
iam able to display first and last records only

i am not getting how to display all the records in reportviewer control

please help me

Thanks in advance