Problem with form after exporting

Hi everybody,
I have a .exe file made for Windows Mobile 6.5. and I exported assembly source using reflector. I open it in Visual Studio 2008 and when I try to open form I received some errors:
- The first one is about "AutoScaleMode" and I resolved this changing the code from "this.AutoScaleMode = AutoScaleMode.None;" to "this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.None;"
- Now I got many warnings about like "Duplicate declaration of member 'point'" or
"The type 'System.Windows.Forms.Form' has no property named 'chkNumPad'."

How can I solve this?
Maybe it depends from the fact that's a mobile app? I tried to change the target to mobile but without success.
Thanks,
Andrea