.Net problem - totally stuck

I am just starting to play around with using vb.net with AutoCAD 2009. I have experience using VBA and Lisp so I'm not a total noob, but i'm totally stuck nonetheless.

I'm running AutoCAD 2009 on 32bit Vista and am programming using vb.Net express 2008.

I downloaded the code for "introduction to .net programming" and am trying to get one of the sample commands to work as I go through the tutorial. http://usa.autodesk.com/adsk/servlet/index?siteID=123112&id=1911627

Here's the code I have: (copied straight from the sample code)

[size=2][color=#008000][size=2][color=#008000]' declare a paletteset object, this will only be created once[/color][/size]
[/color][/size][size=2][color=#0000ff][size=2][color=#0000ff]Public[/color][/size][/color][/size][size=2] myPaletteSet [/size][size=2][color=#0000ff][size=2][color=#0000ff]As[/color][/size][/color][/size][size=2] Autodesk.AutoCAD.Windows.PaletteSet[/size]
[size=2][color=#008000][size=2][color=#008000]' we need a palette which will be housed by the paletteSet[/color][/size]
[/color][/size][size=2][color=#0000ff][size=2][color=#0000ff]Public[/color][/size][/color][/size][size=2] myPalette [/size][size=2][color=#0000ff][size=2][color=#0000ff]As[/color][/size][/color][/size][size=2] UserControl1[/size]
[size=2][color=#008000][size=2][color=#008000]' palette command[/color][/size]
[/color][/size][size=2]<CommandMethod([/size][size=2][color=#a31515][size=2][color=#a31515]"palette"[/color][/size][/color][/size][size=2])> _[/size]
[size=2][color=#0000ff][size=2][color=#0000ff]Public[/color][/size][/color][/size][size=2][color=#0000ff][size=2][color=#0000ff]Sub[/color][/size][/color][/size][size=2] palette()[/size]
[size=2][color=#008000][size=2][color=#008000]' check to see if it is valid[/color][/size]
[/color][/size][size=2][color=#0000ff][size=2][color=#0000ff]If[/color][/size][/color][/size][size=2] (myPaletteSet = [/size][size=2][color=#0000ff][size=2][color=#0000ff]Nothing[/color][/size][/color][/size][size=2]) [/size][size=2][color=#0000ff][size=2][color=#0000ff]Then[/color][/size]
[/color][/size][size=2][color=#008000][size=2][color=#008000]' create a new palette set, with a unique guid[/color][/size]
[/color][/size][size=2]myPaletteSet = [/size][size=2][color=#0000ff][size=2][color=#0000ff]New[/color][/size][/color][/size][size=2] PaletteSet([/size][size=2][color=#a31515][size=2][color=#a31515]"My Palette"[/color][/size][/color][/size][size=2], [/size][size=2][color=#0000ff][size=2][color=#0000ff]New[/color][/size][/color][/size][size=2] Guid([/size][size=2][color=#a31515][size=2][color=#a31515]"D61D0875-A507-4b73-8B5F-9266BEACD596"[/color][/size][/color][/size][size=2]))[/size]
[size=2][color=#008000][size=2][color=#008000]' now create a palette inside, this has our tree control[/color][/size]
[/color][/size][size=2]myPalette = [/size][size=2][color=#0000ff][size=2][color=#0000ff]New[/color][/size][/color][/size][size=2] UserControl1[/size]
[size=2][color=#008000][size=2][color=#008000]' now add the palette to the paletteset[/color][/size]
[/color][/size][size=2]myPaletteSet.Add([/size][size=2][color=#a31515][size=2][color=#a31515]"Palette1"[/color][/size][/color][/size][size=2], myPalette)[/size]
[size=2][color=#0000ff][size=2][color=#0000ff]End[/color][/size][/color][/size][size=2][color=#0000ff][size=2][color=#0000ff]If[/color][/size]
[/color][/size][size=2][color=#008000][size=2][color=#008000]' now display the paletteset[/color][/size]
[/color][/size][size=2]myPaletteSet.Visible = [/size][size=2][color=#0000ff][size=2][color=#0000ff]True[/color][/size]
[/color][/size][size=2][color=#0000ff][size=2][color=#0000ff]End[/color][/size][/color][/size][size=2][color=#0000ff][size=2][color=#0000ff]Sub[/color][/size]
[/color][/size]

So the code would work, I created a usercontrol with a treeview on it, and nothing else. It is named usercontrol1.

The code is erroring out at the line:

myPaletteSet.Add("Palette1", myPalette)

I am getting the following error returned to me:

"Request for the permission of type 'System.Security.Permissions.SecurityPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed."

and a snippet from the exception detail:

"System.Security.SecurityException was unhandled by user code"

Any ideas from the more experienced programmers out there?

After some digging around I found out that the problem is that the .dll I was loading was on a network drive and this was causing some sort of permission issue with .net when loading a palette.

Once I moved the .dll onto my local drive everything seemed to work just fine.

If any of you have additional insite on this, let me know.

Thanks,

Joe