[horde] Failure in Authentication Using Backend 'SQL'

[ACAY]

I've used CVS Horde distributiion for several months.

For log-in I used 'application' and 'imp' drivers. No problems.

I tried to use 'sql' and 'mysql'. Problem - wrong user name/password.

Why ? When I have the same user name in 'horde_users' and 'password' 
as the one I enter in login.php ?

I used mysql command to enter user in 'horde_users' as follows:

USE horde;
insert into horde_users (user_uid, user_pass) values ('myuser', password('mypass'));

Any help is appreciated.