Cryptsy has updated the security layer

Cryptsy has updated the security layer so the API client needs to support cookies, so i changed from WebRequest to HttpWebRequest and added a CookieContainer to handle this.

Security Note from Cryptsy: "Since implementation of our new security layer, some API clients are getting denied access. If possible, you should program your bot to accept cookies to pass the security test. If you are still unable to connect, then contact us with your IP address so that we may whitelist your application."