Printing and Plotting

[#1]

How to update dwg to pdf driver? Running Autocad 2011.

Thanks in advance

[#2]

There is nothing to "update": can you explain your issue? There might be an alternative.

[#3]

My problem is that when print pdf from sheet set, or by using print command using that plotter, the pdf file comes blank, or sometimes Autocad crashes, not only my computer but others on the server,

I tried an other driver which is a trying pdf version (It puts a Ad stamp on each pdf sheet), it worked fine