PXI-6704 voltage output latency

I have on old PXI-6704 and I want to generate 1 channel, 1 sample voltage output.

Everithng  is working as expected exept for the output latency. I can see all samples are generated (the update rate is 5ms bigger than the max of 1.8ms), but I can messure a delay of aprox. 50ms from the moment of  DAQmx Write and the Voltage generated.

Is there any method to configure the card to reduce the FIFO.  I alredy tried a lot of samples from people with similar problems but their solution did not worked on my PXI-6704.

Any suggestions will be mutch appreciated,

Thanks.