[newbie question] - Can't 'fix' particles ? Option is greyed out

[discofever]

You cannot fix both position and orientation because cloth particles are not oriented. You can only use the "fix position" option. This is explained here:

http://obi.virtualmethodstudio.com/tutor...iting.html

Quote:
"Note that the fix button will only be enabled if the ObiActor makes use of oriented particles. Currently the only ones that do are ObiRod and ObiSoftbody."

Hi, 

I don't get it sorry. I followed your youtube tutorial and in the video you "can" fix it; so is the video wrong ? 
Everywhere else even in your page http://obi.virtualmethodstudio.com/tutor...iting.html "fixing" is enabled.

So ... how do I fix a particle ?