xmlreader MGTwitter:libxml /。h文件未在XCode 4.5中找到。

I just downloaded Xcode 4.5 and I cant seem to run my application as the MGTwitter... classes are complaining of a non inclusion error of LibXML2. I have imported it into the frameworks folder, and I have put the following in the header bit in the build settingsI just downloaded Xcode 4.5 and I cant seem to