Trapping errors from System.Net.WebRequest

Hi,

I'm trying to connect to a URL in OE10.2B using System.Net.WebRequest;

WebRequest = System.Net.HttpWebRequest:Create(CONNECTION_URL) NO-ERROR.

I'd like to be able to trap any errors created by the server not being available but I get a system error;

System.Net.WebException: Unable to connect to the remote server
and
System.Net.Sockets.SocketException: No connection could be made because the target machine actively refused it 127.0.0.1:3000

I've tried no-error and CATCH but so far without success. Ideally I'd like to be able to trap this error and then retry a number of times after a short pause. Is this possible?

Thanks,

Mark.