Data Mining Model Processing error

Hai,
I am using Microsoft Clustering algorithm to group the sales based
upon the location.

I have the olap cube and it is working.

but when i create a mining model i am getting error like

"Analysis Server Error: COM (OLE) error '(Microsoft® OLE DB Provider for
Data Mining Services) Mining model remains in an untrained state due to
insufficient training data' ; Time:4/16/2005 10:03:03 PM"

Please help me what is the reason for getting this error and how can i
rectify this problem.

it is very urgent.

Thank you,
karthik
.