Analytics Software

Hi everyone,
I am trying to open the existing reports from the catalog. When i try to expand the folders am getting all the subfolders and evrything and when i am trying to open a particular report am unable to open it, am not getting the data. For all the reports in the catalog am getting the same pbm. What might b the pbm for that, Could anyone pls ans my question bcoz i am having requirement on BIP which am new to it.,,,,


Regards
Lalitha