Problem accessing Windows 2003 DC Registry Keys

[Isaias Formacio Serna]

Hi, I'm trying to read some Registry Keys I've created with a Web Service,
in my workstation it works fine, but when i move it to a server (a Windows
2003 Domain Controller running Windows Sharepoint Services), I keep having
the same error:

System.Security.SecurityException: Request for the permission of type
System.Security.Permissions.RegistryPermission, mscorlib,
Version=1.0.5000.0, Culture=neutral, PublicKeyToken=b77a5c561934e089 failed.
at System.Security.CodeAccessSecurityEngine.CheckHelper(PermissionSet
grantedSet, PermissionSet deniedSet, CodeAccessPermission demand,
PermissionToken permToken)
at System.Security.CodeAccessSecurityEngine.Check(PermissionToken
permToken, CodeAccessPermission demand, StackCrawlMark& stackMark, Int32
checkFrames, Int32 unrestrictedOverride)
at System.Security.CodeAccessSecurityEngine.Check(CodeAccessPermission
cap, StackCrawlMark& stackMark)
at System.Security.CodeAccessPermission.Demand()
at Microsoft.Win32.RegistryKey.OpenSubKey(String name, Boolean writable)
at Bluenode.Gourmet.ConfiguracionServidor..ctor()
at Bluenode.Gourmet.AccesoConfiguracion.get_Servidor()
at Bluenode.Gourmet.DataBase.AdmBaseDatos..ctor()
at Bluenode.Gourmet.Services.pos.ActualizaTokenPOS(String POSLogin,
String POSPassword, String IdInstalacion)

The state of the failed permission was:
<IPermission class="System.Security.Permissions.RegistryPermission,
mscorlib, Version=1.0.5000.0, Culture=neutral,
PublicKeyToken=b77a5c561934e089"
version="1"
Read="HKEY_LOCAL_MACHINE\Software\Bluenode\Gourmet
2004\Server\."/>

I've tryed to do this workarounds but they don't seem to work:
http://support.microsoft.com/default.aspx?scid=kb;en-us;315158

I've even given my keys the Everyone Full Access permission and keeps
happening the same thing, please help!