4461 DAQmx independent input channels

Dear Community,

at the moment I am working on the data acquisition using a PXIe-4461.

I have managed to read out one channel, also both channels simultaniously is no problem.

When I do so I am creating a task by:

tOsc = new NationalInstruments.DAQmx.Task(sTaskName);
tOsc.AIChannels.CreateVoltageChannel("PXI1Slot4/ai0:1", "AnalogIn", AITerminalConfiguration.Pseudodifferential, -10, 10, AIVoltageUnits.Volts);

Which gives me a task from which I can read waveform data of both channels.

What I have tried but did not get to work (I guess I have some kind of missunderstanding, I just startet working with this Hard/Software) is to create a task  (array) for each analog channel like:

NationalInstruments.DAQmx.Task[] tOsc;
int nChannel = 2;
tOsc = new NationalInstruments.DAQmx.Task[nChannel];
for (int iChannel = 0; iChannel < nChannel; iChannel++)
{
tOsc[iChannel] = new NationalInstruments.DAQmx.Task(sTaskName);
string sViChannelName = "AnalogIn_" + Convert.ToString(iChannel);
string sResource = "PXI1Slot4/ai" + Convert.ToString(iChannel);
tOsc[iChannel].AIChannels.CreateVoltageChannel(sResource, sViChannelName, AITerminalConfiguration.Pseudodifferential, -oSD.OscRange[iChannel], oSD.OscRange[iChannel] , AIVoltageUnits.Volts);
}

which would give me the possibility to manage my settings and tasks convinient in arrays.

However, using this for task creation and configuration works fine, also 

tOsc[iChannel].Control(TaskAction.Verify);

in the for loop give no error.

When I try to start the task I get the error message that the resource is occupied.

My gues would be that I block the resource already by starting one task for the module.

But how I could manage and use both channels independent?

Thanks for reading and I am looking forward to your replies.

Best wishes

Johannes