KPI List errors

Hi,

I have had a KPI list on a dashboard for a while now and recently i've started getting the following error when viewing the KPI's:

"Office SharePoint Server could not find the group credentials for the secured application. Contact your administrator for more information."

I am not sure as to why this has started happening and would appreciate if anyone could shed some light on matter. The data connection file works for other web parts so i don't believe this to be the issue. I have tried recreating the list from scratch and this too provides no further insight; only the same problem.

Any help on this matter would be greatly appreciated.

Thanks in advance,

Grant

[729 byte] By [GrantSwan] at [2008-1-4]