Lotus notes on Mac with Lion

Hi - I installed Lotus Notes client on my iMAC under OSx Lion and the configuration worked fine. Tried the same thing on my MacBook Air and i run into roadblocks. The problem: when I try to ignite the ID file to launch the installation and configuration of Lotus Notes 8.5.3, the following error message appears: Unable to open Name and address book (file name.nsf) due to error File does not exist. Locations cannot be used until the problem is solved. When clicking ok on this, a second error message appears: File "/users/name/Library/Application Support/Lotus Notes Data/xxxx.nsf, does not exist. Interestingly enough it worked fine on the iMac, but on my MB Air it doesn't. i wondered if any of you encountered similar difficulties around the .NSF file.
Thanks much for any recommendation