I was trying to set up dasBlog on my development laptop, which is a 64-bit machine, and got an error message that said "Could not load file or assembly 'BasicFrame.WebControls.BasicDatePicker' or one of its dependencies. An attempt was made to load a program with an incorrect format."

I searched online and found one blog post that had a suggested solution to "Download the x64 edition from http://www.basicdatepicker.com/ (manual install) and copy (override) the "BasicFrame.WebControls.BasicDatePicker.dll" from that zip file to your "bin" folder in the dasBlog web."  I went to that site and was going to download it, but it turns out they don't allow you to download that dll for free anymore.  Then I remembered IIS could run in a 32-bit compatibility mode, and modified the application pool settings to reflect those shown below.  Jackpot ... everything loaded correctly after that.