I was trying to configure live writer to post to my blog which is set up using DasBlog. Well as all Microsoft products it is very easy to configure, select Blog provider as 'other', give your blog url and user name and password which you use to blog, and click next that's all. All settings will be configured automatically.
Well, you might be wondering what is there to blog about this, there is one important setting in your blog which if you don't set you will get "service disabled Error" while trying to configure the LiveWriter for DasBlog.
In your blog configuration(at you DasBlog) you have to enable the "Blogger/MovableType API", else you will get the Service disabled error in live writer.
Hope it will be useful for at least some one.:)
-Rujith