I know how to attach an image in my signature at the astahost main forum.
I would like to know how to do it in my hosted phpbb2 forum, the one I created with fantastico.
I tried simply put the same one with the same syntax, no image appears.

Host your image on Photobucket ( make an account)

or imageshack ( no account needed)

for photobucked, there will be a box, check it and go down to IMG button

you'll go to a page with codes

choose the one that says " For message boards"

its a [IMG] code,

then put it on ur signature

Thanks a lot, now I see the problem.
My board simply does not show my signature, even if it's pure text ! the "always attach my signature" is set to
yes, but the signature is not displayed.
It's probably a bug of the current phpbb2 version. Does it work on your board ?

In the administration panel there might be an option to disallow signatures. Check if it is turned on.

Yeah somtimes you got a disallow sigs, or like i said u may just need a [IMG] Code

Or check your settings in the BBCode section in the admin panel, something might be wrong with the BB to HTML conversion

everything is on : html yes, bbc yes, attach sig yes.
And even pure text does not work.

This is just a wild guess, but maybe if you are using a non-default skin it doesn't support signatures

nope, I didn't modify the skin, I used the one installed by Fantastico at Cpanel.