Windows 7 - Internet Connection Sharing problem in Windows 7

I have a Sony Vaio VPCEB26FG laptop, Ipod Touch 8GB.
I have connected the ethernet port to an internet connection with a dynamic IP. I have done the Ad-hoc connection so that laptop acts as a Wi-fi hotspot, and i can connect the Ipod to this hotspot through Wi-Fi.
I am able to connect the Ipod to the hotspot, but not able to share the internet access.The LAN adapter is not allowing me to share the internet connection. Whenever i try to give the share access it says "An error occurred while Internet Connection Sharing was being enabled. (null)?”

Checked out all the services related to ICS and all were running fine.
The internet connection is also fine, no problems found with that. Just that i am not able to share the internet access.
Any solutions for this?

I have had exactly the same problem as you on multiple occasions. Opposed to messing around with complicated configurations I would always recomend the use of Connectify (Connectify - Turn your Windows 7 laptop into a Wi-Fi Hotspot).

Connectify turns any computer with a WiFi card into a completely configurable WiFi hotspot and it can be up and running in a couple of minutes.

Another advantage of Connectify is that it doesn't require you to be using a fixed connection (ehternet) to share the internet connection via WiFi. You can be connected to your router via WiFi and be acting as a WiFi network off the same WiFi card.

I hope this solves your networking problems as it did mine.

Oli