[horde] mail > login failed ???

[Mehmet Fatih Akbulut]

hi all,
mnemo, turba, chora, kronolith, nag, gollem, ingo, mimp, passwd these
are installed packages. and i created a new user named root with
password akbulut. [this user also has administrative priviledges.]
when i try to login in my mail account :
http://localhost/horde/imp with username root and password akbulut
horde doesnt let me in :'(
where am i doing wrong ?
what else should i do so as to login my mail and start sending mails ???
help please ;)