Configure failed for gio-sharp

[Silvano <silvanociru gmail com>]

I'm trying to build F-Spot from sources and I get following error:
    checking for al... no
    configure: error: No al tool found. You need to install either the
mono or .Net SDK.
    configure: error: ./configure failed for gio-sharp

But I have mono installed! Even the version 1.9.1 following this
instructions: http://www.mono-project.com/Other_Downloads#Ubuntu_8.04_LTS_.28Hardy_Heron.29_-_backport_packages:
(I have Ubuntu 8.04, Hardy Heron)

Could anybody help me to resolve this error?

Cheers,
   Silvano

-- 
"La superstición trae mala suerte." - Raymond Smullyan

"Superstition brings bad luck." - Raymond Smullyan