Error In Fetching Data

hello i'm using visual studio 2005 and asp.net 2 i have an error in the code that fetching data from databse in grid here is the code :

Dim con As SqlConnection
        con = New SqlConnection("Data Source=local;AttachDbFilename='D:New Folderhorushorus.mdf';Integrated Security=True")
        Dim cmd As New String("SELECT TOP (10) serial, name, gender, dateofbirth FROM(dbo.students)ORDER BY RAND(CONVERT(varbinary(4), NEWID()))")
        Dim cd As SqlDataAdapter
        cd = New SqlDataAdapter(cmd, con)
        Dim ds As New DataSet()
        cd.Fill(ds, "students")
        grid.DataSource = ds.Tables("students").DefaultView
        grid.DataBind()

that code is selecting random records from the database and showing it in grid the error is in the cd.fill(ds,"students") line so can any one help me in that problem.thanks