[eluser]DimCI[/eluser]
The problem is off now
If anybody'd ever find himself bumped into this one, the solution is pretty simple: do not use CI captcha plugin but just change in your autoload.php the only value:
from: $autoload['plugin'] = array('captcha');
to: $autoload['plugin'] = array('dx_captcha');
and that's all
May be php+windows mix (or my apache?) has a small problem about functions redeclaration..
Sorry for my buggy English, tnx.