Hello, Thanks for your answer.
I found an exact description of my problem while reading one post on
the forum and it seems this is impossible to solve on my architecture.
(see http://forums.ni.com/ni/board/message?board.id=140&message.id=12712&query.id=88097)
The current architecture I am using can only read 4 byte from pci memory space...
Any possibility to read pbar1 register of this board with 32 bits access?