UIWebView cannot work properly (Unity3.4.1 and Xcode3)

We made UIWebview plugin connect to Unity. We got problem and would like to ask for some advises or idea.

1. We found that html pages which have input textboxes, we cannot type on thoes textboxes. All interactive stuff did not work(such as link, button). We can only scroll the pages.

2.When closed popup from UIWebview, UIwebview was freeze.