Graph appears only on the test column but nor on the trends page

Hi all,

I am using hobbit 4.1.2p1 and I monitor some MS IIS webservers with
"iishealth-Script from deadcat. When I click on the "iishealth" button
on a specific host I see the graph for iis connections and sessions. 

This graph is missing under the "trends" view. There is only a dead link
for iishealth. All other graphs appear normally.

Any ideas?

Thanks in advance. Chris