generqte a PWM signal with LabVIEW using digitals outputs

Hi i2dx, it's me again.
Last time, I had told you I had an error (-200077) and I found what was the problem : your program can't work with my 6070E because, I have found a exemple in LabVIEW (Cont Write Dig Port-Ext Clk.vi) with use the same VI as your program, and I get the same error. I ckecked out, the 6251 card that you used is in the list of hardware compatible with the exemple, but not the 6070E card. So I have to find another solution to generate a PWM signal to the DO line. I would like to know if you think that I can use the exemple "Write Dig Chan.vi" in replacing "Data to write" by a waveform which will be a PWM signal waveform and how can I do that ?
Thanks