MonoDroid socket access denied

I am porting an application from WM to Android using MonoDroid.

I am currently facing a problem where initializing a socket always throw an Exception 'SocketException: Access Denied' on this line:

using (Socket sock = new Socket(AddressFamily.InterNetwork, SocketType.Raw, ProtocolType.Icmp))

The source port is 9000 and destination port 9600.

The 'AndroidManifest.xml' file do have:

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_MULTICAST_STATE" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
<uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />

And 'AssemblyInfo.cs':

[assembly: UsesPermission(Android.Manifest.Permission.Internet)]
[assembly: UsesPermission(Android.Manifest.Permission.AccessNetworkState)]
[assembly: UsesPermission(Android.Manifest.Permission.AccessWifiState)]
[assembly: UsesPermission(Android.Manifest.Permission.ChangeNetworkState)]
[assembly: UsesPermission(Android.Manifest.Permission.ChangeWifiMulticastState)]
[assembly: UsesPermission(Android.Manifest.Permission.ChangeWifiState)]
[assembly: UsesPermission(Android.Manifest.Permission.WriteExternalStorage)]

Tried on two different devices(OS 2.3.5 and 4+), in both Debug and Release.

The problem is starting to drive me crazy.

Thanks in advance!