(2005) data transfare

[GARAKWAZVO]

Guys im getting an err msg (dataset can't be null)from the following code can somebody help. I want to expot my data from oracle to sql using my code. most wellcome will be suggestions to the code

conn.Open()
            'collecting from a database
            gerry = "SELECT STTM_CUST_PERSONAL.FIRST_NAME, STTM_CUST_ACCOUNT.CUST_AC_NO, STTM_CUST_ACCOUNT.ADDRESS1, STTM_CUST_ACCOUNT.ADDRESS2, STTM_CUST_ACCOUNT.ADDRESS3, STTM_CUST_ACCOUNT.ADDRESS4, STTM_CUST_PERSONAL.TELEPHONE, STTM_CUST_PERSONAL.LAST_NAME, STTM_CUST_PERSONAL.FAX, STTM_CUSTOMER.COUNTRY, STTM_CUST_PERSONAL.E_MAIL FROM STTM_CUST_ACCOUNT, STTM_CUSTOMER, STTM_CUST_PERSONAL WHERE STTM_CUSTOMER.FROZEN='N' AND STTM_CUSTOMER.DECEASED = 'N' AND STTM_CUSTOMER.WHEREABOUTS_UNKOWN = 'N'AND STTM_CUST_ACOUNT.CUST_NO = STTM_CUSTOMER.CUSTOMER_NO AND STTM_CUSTOMER.CUSTOMER_NO = STTM_CUST_PERSONAL.CUSTOMER_NO"
            da = New OracleDataAdapter(gerry, conn)
            da.Fill(ds, "gerry1")
            'FILLING THE NEW DATABASE
            myConnection.Open()
            myCommand = New SqlCommand("INSERT INTO accounts (FIRST_NAME, LAST_NAME, CUST_AC_NO, ADDRESS1, ADDRESS2, ADDRESS3, ADDRESS4, TELEPHONE, FAX, COUNTRY, E_MAIL) VALUES (gerry1.FIRST_NAME, gerry1.LAST_NAME, gerry1.CUST_AC_NO, gerry1.ADDRESS1, gerry1.ADDRESS2, gerry1.ADDRESS3, gerry1.ADDRESS4, gerry1.TELEPHONE, gerry1.FAX, gerry1.COUNTRY, gerry1.E_MAIL)", myConnection)
            ra = myCommand.ExecuteNonQuery()
            MessageBox.Show("Records transfered" & ra)
myconnection.close()
conn.close()