我按照文档上的顺序做的。。但是总是报这个错误，，页面能正常进入qq授权的页面，但是loginWithCallback回调那个接口应该是没有执行，请问这个怎么结局
11-07 16:55:33.460 15673-15673/milk.inhand.com.inhandmilk D/===AVOS Cloud===﹕ LogUtil$avlog->d->28: not file object:java.io.FileNotFoundException
11-07 16:55:33.460 15673-15673/milk.inhand.com.inhandmilk W/System.err﹕ java.io.FileNotFoundException
11-07 16:55:33.460 15673-15673/milk.inhand.com.inhandmilk W/System.err﹕ at com.avos.avoscloud.AVPersistenceUtils.readContentBytesFromFile(AVPersistenceUtils.java:178)
11-07 16:55:33.460 15673-15673/milk.inhand.com.inhandmilk W/System.err﹕ at com.avos.avoscloud.AVPersistenceUtils.readContentFromFile(AVPersistenceUtils.java:163)
11-07 16:55:33.460 15673-15673/milk.inhand.com.inhandmilk W/System.err﹕ at com.avos.sns.SNSBase.load(SNSBase.java:149)
11-07 16:55:33.460 15673-15673/milk.inhand.com.inhandmilk W/System.err﹕ at com.avos.sns.SNSBase.hasValidSessionToken(SNSBase.java:195)
11-07 16:55:33.460 15673-15673/milk.inhand.com.inhandmilk W/System.err﹕ at com.avos.sns.SNSQQ.logIn(SNSQQ.java:55)
11-07 16:55:33.460 15673-15673/milk.inhand.com.inhandmilk W/System.err﹕ at com.avos.sns.SNS.loginWithCallback(SNS.java:110)