从Web部件更新SPPersistedObject时出错

I have written two features in SharePoint 2007. One is scoped at Site level and it basically adds a web part to the site collection where it is activated. This feature assembly is deployed under the 'bin' directory. Second is Farm scoped which is my custom SPPersistedObject and is deployed in Central Administration. The assembly is added to GAC.I have written two features in SharePoint 2007.