win2003server: problem with user permission

[mattia]

Hello, i compiled my app and i installed it under win2003server as admin.
If i run my app as admin i've not problem, but if i run it as simple user i can't create directories and files, i have no this permission.

The directory path, where to save data, are saved with QSetting in some keys, for example, they are in:

HKEY_CURRENT_USER->Software->myapp
keyname: path
keyvalue: C:\Documents and settings\admin\myapp

this for admin user.
Now, i switch user and i try with a simple user, the key "path" is always in the same place with the same value..., so when i lunch my app and i try to write a directory on filesystem i get an error, but a normal user can't write in "C:\Documents and settings\admin\myapp" 'cause , he/she has not the permission.

I hope i've been clear
What should i do to fix it?
thx

edit
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to retrieve the path where to save data i use:
QDir::home ().absolutePath()