thanks SeedyBee and t00mcio. function 5D is clear for me but I had to check it. The problem is that pixel knight 332 does not want to work at all with a 580 or 430EXII and canon 550D bady, even in manual mode, does not works at any mode!! there is some comunikation but it looks every time diferent. all what hapen is changing displays at flash screean.
I do not know wich version I have, how can I recognize?
I would sey that my transmiter or reseivers are damaged..

is it some one who tryed pixel knight 332 on canon 550 bady?