OK, here's a tougher one... I was working through the Aquarium sample. Everything was going swimmingly. Suddenly, as I was almost done with the chapter, I ran the project and got "Unable to connect to Lightswitch server". I Googled and found this: http://social.msdn.microsoft.com/For...f-fdea9883618b
. So, I did what it said... Set my view in Solution Explorer to File View instead of Logical View, went to Common and found the References of the project. I am indeed on a 64-bit o/s (Vista 64). I have full Visual Studio Ultimate loaded + some Telerik controls (just for background information). But, when I view References, I can see that the reference to the Lightswitch Server DLL is in Program Files (64) (i.e. the 64-bit version). So, the link above doesn't really help me, as I'm already referencing the native DLL for my o/s. I changed the Reference to Copy Local, as I've seen that help before, but to no avail. Every time I run the project, I get "Unable to connect to Lightswitch server"... So, because LS is so fast at creating screens, etc., I went ahead and rebuilt the project as Aquarium2. This time, everything works just fine. Everything runs, and I put in all of the same modifications that I did the first time. But, the behavior is quite different... Aquarium2 runs perfectly, and Acqurium won't run at all (even after a reboot), responding only with "Unable to connect to Lightswitch server". Any thoughts?