Comments by jaya verma (Top 3 by date)

i think mainid and typeid are of int type..but @ time of setting the values in these fields you have converted them into string formate..

try this(code is in c# just convert it into vb)

String str = "insert into MaintenanceTask (MainID, TypeID ) values
(int.parse( cBx1.SelectedValue.ToString()),(int.parse(cBx2.SelectedValue.ToString()) ))
and so on for another fields

yes sandeep..problem hsa been solved