Please help me with this error

"Reference to object nonestablished like instance of an object"

this error is show when the debbuger pass over here:

Sub Buscar_Click(ByVal sender As Object, ByVal e As EventArgs)

Dim webd As New NewHost (this is a WebForm called "NewHost")
Dim str As String = Find.Text
Dim cmd As SqlCommand
cmd = New SqlCommand("Select host.* from host inner join people on host.codcli=people.codcli where people.name='" & str & "'", webd.SqlConnection1)

webd.SqlAdDominio.SelectCommand = cmd (HERE IS THE ERROR)

webd.SqlAdDominio.Fill(webd.DS.PEOPLE)
Response.Redirect("NewHost.aspx?sw=false")

End SubJust a guess, but do you have a "New()" sub defined in NewHost that instantiates all your objects, like SqlAdDominio.
i check that and i deleted de "new" word from "Dim webd As New NewHost".
but now the problem is one line before :

"cmd = New SqlCommand("Select dominio.* from dominio inner join cliente on dominio.codcli=cliente.codcli where cliente.nombre='" & str & "'", webd.SqlConnection1)"

and the error is the same. "Reference to an object nonestablished like instance of an object."