Oh, ok, sorry I thought that was the link to the tour you were having trouble with.
Have you tried reinstalling TW5?
Have you tried turning off any security software, i.e. Norton?
Oh, one thing I had to do with both TW4 and 5...I created a new location for the published files on the publish page. I created a TW 5 folder under My Documents and an Output Folder under TW 5 and had the files published to that location. For some reason the default location - on my C drive under Program Folder/TW5... did not work.