Trouble with pkg_add

[Rafael Morales <rafa84aven_(_at_)_yahoo_(_dot_)_com_(_dot_)_mx>]

Hi. I have OpenBSD 3.5 and this my trouble, when I try
to install koffice I see a Collision message:
pkg_add -v
ftp://ftp.openbsd.org/pub/OpenBSD/3.5/packages/powerpc/koffice-1.3.tgz

Dependencies for koffice-1.3 resolve to:
libart-2.3.16,aspell-0.50.4.1,kdelibs-3.2.1,qt3-mt-2.3,python-2.3.3,wv2-0.2.1
(todo: aspell-0.50.4.1,python-2.3.3,wv2-0.2.1)
Adding aspell-0.50.4.1
Dependencies for aspell-0.50.4.1 resolve to:
libstdc++-3.3.2
checking libspec estdc++.5.5 found libestdc++.so.5.5

Collision: the following files already exists <-- THIS
MESSAGE

        /usr/local/bin/aspell
        /usr/local/bin/aspell-import
        /usr/local/bin/pspell-config
        /usr/local/bin/run-with-aspell
        /usr/local/bin/word-list-compress
        /usr/local/include/aspell.h
        /usr/local/include/pspell/pspell.h
        /usr/local/lib/aspell/american-w-accents.alias
        /usr/local/lib/aspell/american.alias
        /usr/local/lib/aspell/british-w-accents.alias
        /usr/local/lib/aspell/british.alias
        /usr/local/lib/aspell/canadian-w-accents.alias
        /usr/local/lib/aspell/canadian.alias
        /usr/local/lib/aspell/en-only.rws
        /usr/local/lib/aspell/en.multi
        /usr/local/lib/aspell/en_CA-only.rws
        /usr/local/lib/aspell/en_CA-w-accents.multi
        /usr/local/lib/aspell/en_CA.multi
        /usr/local/lib/aspell/en_GB-only.rws
        /usr/local/lib/aspell/en_GB-w-accents.multi
        /usr/local/lib/aspell/en_GB.multi
        /usr/local/lib/aspell/en_US-only.rws
        /usr/local/lib/aspell/en_US-w-accents.multi
        /usr/local/lib/aspell/en_US.multi
        /usr/local/lib/aspell/english.alias
        /usr/local/lib/libaspell.a
        /usr/local/lib/libaspell.la
        /usr/local/lib/libpspell.a
        /usr/local/lib/libpspell.la
        /usr/local/share/aspell/ASCII.dat
        /usr/local/share/aspell/dvorak.kbd
        /usr/local/share/aspell/en.dat
        /usr/local/share/aspell/en_phonet.dat
        /usr/local/share/aspell/iso8859-1.dat
        /usr/local/share/aspell/iso8859-10.dat
        /usr/local/share/aspell/iso8859-13.dat
        /usr/local/share/aspell/iso8859-14.dat
        /usr/local/share/aspell/iso8859-15.dat
        /usr/local/share/aspell/iso8859-2.dat
        /usr/local/share/aspell/iso8859-3.dat
        /usr/local/share/aspell/iso8859-4.dat
        /usr/local/share/aspell/iso8859-5.dat
        /usr/local/share/aspell/iso8859-6.dat
        /usr/local/share/aspell/iso8859-7.dat
        /usr/local/share/aspell/iso8859-8.dat
        /usr/local/share/aspell/iso8859-9.dat
        /usr/local/share/aspell/ispell
        /usr/local/share/aspell/koi8-f.dat
        /usr/local/share/aspell/koi8-r.dat
        /usr/local/share/aspell/koi8-u.dat
        /usr/local/share/aspell/spell
        /usr/local/share/aspell/standard.kbd
        /usr/local/share/aspell/viscii.dat
        /usr/local/share/doc/aspell/dev-html/devel.css
       
/usr/local/share/doc/aspell/dev-html/devel.html
        /usr/local/share/doc/aspell/dev-html/img1.png
        /usr/local/share/doc/aspell/dev-html/img2.png
       
/usr/local/share/doc/aspell/dev-html/index.html
       
/usr/local/share/doc/aspell/dev-html/nx_grp_g.png
       
/usr/local/share/doc/aspell/dev-html/prev_g.png
        /usr/local/share/doc/aspell/dev-html/up_g.png
        /usr/local/share/doc/aspell/dev-text/devel.txt
        /usr/local/share/doc/aspell/dev-text/index.txt
        /usr/local/share/doc/aspell/devel.aux
        /usr/local/share/doc/aspell/devel.dvi
        /usr/local/share/doc/aspell/devel.tex
        /usr/local/share/doc/aspell/devel2.lyx
       
/usr/local/share/doc/aspell/man-html/1_Introduction.html
       
/usr/local/share/doc/aspell/man-html/2_Getting.html
       
/usr/local/share/doc/aspell/man-html/3_Basic.html
       
/usr/local/share/doc/aspell/man-html/4_Customizing.html
       
/usr/local/share/doc/aspell/man-html/5_Working.html
       
/usr/local/share/doc/aspell/man-html/6_Writing.html
#

I hope someone could help me.