when i right click the flytreeview, there is an error as the picture shows.
how to void this happend? there is no right click function in the treeview.


用户代理: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; InfoPath.3; MS-RTC LM 8; .NET CLR 1.1.4322; .NET4.0C; .NET4.0E; MS-RTC EA 2)
时间戳: Wed, 5 Dec 2012 03:35:39 UTC

消息: 例外被抛出且未被接住
行: 97
字符: 1
代码: 0
URI: http://dgqeap/Menu/WebResource.axd?d=OYz8OA8bQUKGvg3vVosMYA7h8Gcp7HQanO0nenXmdIok10tq0NHl29mTuNQs9QqFuHSvJveYU7mWHc0RwozhyOghBxUakuOMWpb0bdrshtzdC6Br0&t=634734766060000000