Though, I am new for DNN, I still can tell it is a wonderful framework! I successfully installed the 4.8.4 version, played a lot of features it has. Yesterday I noticed the new version came up and I downloaded once immidiately.

I tried many times yesterday and today, followed the same instruction I did as version 4.8.4, still, I got the same exception, really have no idea what is wrong with my installation. what I did as following:

1. download the installation package of version 4.9.0

2. extract files into a folder d:\projects\DNN490

3. set proper security permission for the folder

4. make a new database named DNN490DB and set up the proper security settings

5. config the web.config file for the new website so that the new application can access the database

6. create new website DNN490.TEST-VSUN.COM in IIS 6 and set up proper setting values

7. explore DNN490.TEST-VSUN.COM in IE 7.0 (Firefox 3.0 in other tests) starting installation

During installation, database is setup properly, modules are installed without problem, even go through the host account setting up step, then I got the exception, any one can give me any ideas? Thanks ahead!!!

If there isn't a web.config, as far as I'm aware there is nothing we can do to make the message any friendlier (due to the limitations of ASP.NET).

Also please consider not using the install version rather than the source version (the source version is mainly for developers, but you may have your own reasons why you want use this, e.g. tweaking).

Funilly enough after years of using this platform I had the same issue (it's too easy to forget!).