What is wrong with this function?

I have this function which calls a stored procedure the pulls records from the database.

This stored procedure takes one parameter, pid:

    private void getRecs(int pid)
    {
           SqlConnection conn = new SqlConnection(connStr);
        //Dim cmd As New SqlCommand(s, conn) switched to stored proc below
           SqlCommand cmd = new SqlCommand("[uspGetAllRecs]", conn);
        cmd.CommandType = CommandType.StoredProcedure;
        SqlParameter p1 = new SqlParameter("@pid", pid);
        cmd.Parameters.Add(p1);
        conn.Open();
        cmd.ExecuteNonQuery();
        conn.Close();

    }

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Then I am trying to call this function on pageload event but it is giving me an error:

        string pid = Session["PID"].ToString();
             getRecs(pid);

This is the error:

Error      1      The best overloaded method match for 'getRecs(int)' has some invalid arguments

Any ideas?