If you want to automate IE, you better use this approach: http://harness.codeplex.com/
If you stick to WebBrowser control (currentwb), try this approach:
HtmlElement link = currentwb.Document.GetElementByID("id_of_element")
Or, if you can't assign id for some reason, you can use this approach.
HtmlElementCollection links = currentwb.Document.GetElementsByTagName("A");
foreach (HtmlElement link in links)
if (link.InnerText.Equals("Link text"))
Be aware to put in the IF statement the proper condition to identify your link.