[PD] asio flag

[.:nRSz:.]

hi list!

is it true that i have to write "pd -asio" in the command line in order 
to load pd with asio drivers? because when i do it like this pd shows me 
  an explanation of the usage of flags and closes the command window 
again. if i dont use the asio flag i have a audio latency up to 0.4 seconds.

i'm working on windows xp an a soundblaster audiogy.
are there any other ways to reduce the latency so i can make "real 
realtime audio analyses"?

best, emanuel