One Cube partition is showing double the value - urgent

Hi,
I am currently working Analysis services 2005
For one partitcular partition alone the data is showing double the value when compared with the backend(view for this partition), were the rest of the partitions are not affected. Since the reports are maped to this cube via webservice the users are looking at wrong figures.
Please can you advise me on this. How the data will be doubled in the cube alone when the partition view is showing the correct figures.
Cube - AS 2005
Database - SQL 2000
Thanks
Arunesh