Compiling ASP.NET Beta 2 for deployment

I built my web site with VWD express edition beta2.

the physical path of my site is c:\Websites\MyApp

I want to compile into c\Websites\MyAppLive

I use ASP.NET compiler as follow from the dos command :

aspnet_compiler -p c:\Websites\MyApp -v / c:\Websites\MyAppLive

The compiler gives me this error :

error ASPRUNTIME : Object reference not set to an instance of an object

Help

[416 byte] By [Kalaka] at [2007-12-16]