datatable select method with boolean value

Question

hai
i havae a datatable that is export table the first column name is select in this we put only true or false value i want filer all rows which have the select field value is true
i am writing the following code

Dim drs As DataRow() = exportDataTable.Select("select= True")

but it can return only one record but in my table nearly 12 record having the true value in that select field what is the problem....