[2008] Problem with Vista 64 bits

Hi,

I am developping an application in VB 2008 (on Vista 32) and I can install and run it on XP and Vista 32 (need to disable DEP).

The problem I am having is when I try to run it on Vista 64. The first thing is I cannot disable DEP for my application, I get a message saying that it cannot run the application without DEP. When I compile the application I make sure the target CPU is x86 because I know that you cannot disable DEP for 64bits apps.

Question is, why cant I disable DEP for my x86 application on Vista 64.

Thanks.