微信小程序中AV-weapp.js文件载不进去，av.init函数未定义

WAService.js:3 TypeError: AV.init is not a function
at e.onLoad (http://1376050149.appservice.open.weixin.qq.com/pages/index/index.js:14:8)
at e.r (http://1376050149.appservice.open.weixin.qq.com/WAService.js:3:7081)
at g (http://1376050149.appservice.open.weixin.qq.com/WAService.js:2:30124)
at w (http://1376050149.appservice.open.weixin.qq.com/WAService.js:2:31332)
at . (http://1376050149.appservice.open.weixin.qq.com/WAService.js:3:1085)
at http://1376050149.appservice.open.weixin.qq.com/WAService.js:3:4701
at http://1376050149.appservice.open.weixin.qq.com/WAService.js:1:22098
at Array.forEach (native)
at . (http://1376050149.appservice.open.weixin.qq.com/WAService.js:1:22078)
at http://1376050149.appservice.open.weixin.qq.com/WAService.js:1:4364