OK, stupid newbie here, attempting to install libxpm4.

I've got an N810 with Diablo. I need libxpm4 in order to install xkbd.

On my N810, I use the browser to go to http://www.gronmayer.com/it/
I click the OS2008 button, type libxpm into the search box and click "Search"

It shows two entries, one for "Maemo Chinook" and the other for "Maemo diablo/sdk". I click the green "click to install!" arrow associated with Diablo.

The application manager launches, it tells me it is searching for updates, and then sits there. "Maemo diablo/sdk" appears to have been added to the application manager's list of repositories. However, libxpm4 does not appear to have been downloaded. Specifically, if I try to install xkbd, it tells me it cannot install because libxpm4 is absent.

Please have pity on a clueless newbie and tell me what I am doing wrong.