guile-dbi problem

[wensheng xie]

Hi,

I have problem using guile-dbi after installing it from 
https://github.com/opencog/guile-dbi
The problem:

scheme@(guile-user)> (use-modules (dbi dbi))
scheme@(guile-user)> (define ciccio (dbi-open "mysql" 
"blog:password:mmr_blog:tcp:localhost:3306"))
<unnamed port>:13:0: Unbound variable: dbi-open

Entering a new prompt.  Type `,bt' for a backtrace or `,q' to continue.
scheme@(guile-user) [1]> ,bt
In current input:
     13:0  0 (_)

my database is mmr_blog, user is blog, password is password.

Do I need setup other environments?

best regards,
wxie