In article <43bndd$4lr@sollube.sarenet.es>, ppc@fend.es says... (..)
>I took some photos with the flash of friends that were placed near a >wall. Of course, it's natural that some shadows had appeared, as it >was. But, could anybody tell me what should I do not to have this >problem?

A few simple ideas:
Shoot horizontal photos - the shadows will be mostly behind the
subject (I do not like flash brackets, since the high flash
position leaves what I call the "wrought-iron chin brace" look
from the deep under-chin shadows).
When shooting verticals, use a styrofoam cup over the end of
the flash head, with the head pointed up (if this is possible)
with your flash) to get the light source above the lens.
Use higher-speed film so that more ambient light can be used
to help fill the shadows, and produce more natural modeling
than the flash alone.
Bounce the flash light off the ceiling or walls, if the flash has
enough power, the color of the reflecting surface is not a
problem, and surfaces are close unough to be useful.
Hope this helps.