OLAP Cube on the server

[Newbie]

Hello Experts,
I create and displayed an OLAP Cube on a station connected on the Project
Server. Works fine.
I tried to look at this same OLAP Cube on the server itself with the
administrator's permissions : access denied.
I tried to update the OLAP Cube on the server : in the Update resources
tables and OLAP Cube, I got the error message:
"Cube creation failure on 25/06/2005"
(14) Cube didn't build because of security chek failure"

What is the matter ???
Thanks for help,

Newbie