data_source = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=" & Server.MapPath("vacancies.mdb")


sql_insert = "INSERT INTO job(position,jobdescription,salary,startdate,contact) " _
& "VALUES ('" & position & "', '" & jobdescription & "'," & salary & ",'" & startdate & "', '"& contact & "')"

i 've assumed that salary is the integer field.