How upgrade a Shared Network Installation

Hello,We have Lotus Notes 5.08 installed on a network drive,shared by many users.

We would like to upgrade this Notes 5 installation.

We have create on the network drive, a new directory for Notes 6 and create a transform file to customize the installation.

But during installation, we have the “error 1317:an error occurred while attempting to create the directory U:\note5Shareinstall\license”

Where U:\note5shareinstall is our old Note 5 network directory.

Thant means, we cannot upgrade a shared network installation ?

How can we proceed to upgrade ?

Thanks for you help.