Python reading and writing

[wrausch112358]

I am having trouble reading signals and also doing a write task.  I  get this error:

nidaqmx.errors.DaqError: The specified resource is reserved. The operation could not be completed as specified. i am using a USB 6001, and do not need very fast sampling rates, I just want to take the data and send out a voltage output.
Task Name: _unnamedTask<4B4>

Status Code: -50103

Here is my code:

with nidaqmx.Task() as writeTask, nidaqmx.Task() as readTask:
                readTask.ai_channels.add_ai_voltage_chan(self.deviceName, 
                             terminal_config = nidaqmx.constants.TerminalConfiguration.RSE)
                readTask.ai_rng_high = 10.0
                readTask.timing.cfg_samp_clk_timing(rate = 10,
                             sample_mode = nidaqmx.constants.AcquisitionType.FINITE,
                             samps_per_chan = 10)
                data = readTask.read(number_of_samples_per_channel=10)
                writeTask.ao_channels.add_ao_voltage_chan("Dev3/ao0")
                writeTask.timing.cfg_samp_clk_timing(rate = 10,
                               sample_mode = nidaqmx.constants.AcquisitionType.FINITE, 
                               samps_per_chan = 2)
                writer = AnalogMultiChannelWriter(writeTask.out_stream)
                writer.write_many_sample(np.array([[2.0]]))