Binding Navigator in vb.net

Question

hi everyone
i have done project in vb.net in that i navigate the records by using of binding navigator and it is working successfully but i need help to add one new record by using of the  same navigator and also the update,delete and all

if i wrote code as samplebindingsource.addnew() means it shows error

where sample is my table name and binding source is used for bind the data to datasource.

can anybody give a solution for that

its very urgent

regards
vijay