WLAN Ad-hoc with ICS in Vista - Internet access problem

I have the following configuration:
- Broadband Internet Connection via Ethernet to my Desktop. Its comes in directly from a Router DSL modem [FONT='Verdana','sans-serif'] (Siemens Speedstream 4200)
- Both my Desktop & Laptop have WLAN radios. (And they're very much tried &
tested!)
- Both have MicrosoftR WindowsR Vista


I set up an WLAN ad-hoc network between them and it works. I can access the HDs from each other through the WLAN; also the remote desktop access works.
In the desktop I enabled the ICS. BUT there is no way to get access in the Laptop.

I have disabled the Firewall to test and nothing changed.

Sometime ago I had set up the same network and it worked perfectly then

I deleted it because I was trying some othe configurations.


Now there is no way to get internet access in the Laptop.


Any tip?


Thanks in advance for your support