Thistall problem

I also use Thinstall on my .net application that is used on more then
1000 laptops using network and to be true...
It rocks.. because no Framework 2.0 installation needed, i dont have
to give permisions in all laptops for use my application on network.
BUT i have found a big problem on Thinstall , when i try to execute a
aplication "shell(app.path &"\setup.exe" ) for example the setup just
block.... any setup i try to execute with my application dont work...
its just get like blocked...

And when i try to use my application but now without the Thinstall
Framework emulating it works great...

I have tryed to do like this... Ok my application cant execute
Setups.exe ok... then i send a command to DOS to execute the
setups.exe ... wrong... because of Thinstall the same problem appens
on DOS command... or VBS script... anything that my application call
the setup.exe wont start....

If any1 could help me....

WIndows : XP Professional
..net application