更新IBM.Data.Informix.dll后，项目给出“对象引用未设置”错误

I developed a ASP.NET 2.0 replacement for an ASP.NET application at work initially using the original's version of IBM.Data.Informix.Dll (2.81). The replacement works fine for the most part, but intermittently hangs when connecting to the database (which is the problem with the original.) I decided to upgrade to the latest version of the dll (3.70), but upon deleting the old version and replacing it with the new, then adding a reference, I now get an "Object reference not set" error whenever I build the application.I developed a ASP.NET 2.0 replacement for an AS