Thanks for your answer FurryNutz,
I just modify (create) my profile, sorry, I'm located in France.
And Yes, I did a reset.
I have DSL, I have a FreeBox revolution wifi router v6.
The DAP is connected to my computer and is using for now as a wireless client and I'm using both g & n wireless mode.
[EDIT] I tried many different configurations to make it work, n only, WEP, WPA, ... unfortunately I couldn't make it work as an access point only !?
[EDIT] It is only the download speed which is critical, the upload one is fine, means it's the same than before with my 11g AP