Problem with project on shared disk

[Frunktz]

Hi folks!
I have a very weird problem with Visual Basic 2008 (either Pro and Express)
I have made a new test application on a shared disk on my LAN
10.0.1.1 -> disk Z:

The problem is that the code I've modified won't RE-compiled..
Example:

Button1_Click
MsgBox ("Hi Folks")

Save -> Compile -> Press Debug (play button ) -> press and I get "Hi Folks"

Next text
Button1_Click
MsgBox ("I have modified that source")
Save -> Compile -> Press Debug..... -> press button and I get "Hi Folks"

On the generation output I didn't see any recompile operations..

On locl disk work perfectly...

Why?

Ps:- I try to remove/set all policy trought Caspol.exe but nothing changes...

Thanks guys
Sorry for my bad English..