Problems with Inno Setup

Hi,
I've used the wizard of inno setup for making an istallation packages of my program in vb.net and i faced some problems.
First of all, if i run my program on a pc with windows 7 (after the installation) if i perform any command on the database an error message tell me that i have the read only pemission, how can i solve that?

However the most strange thing is that, if i run it on a windows xp pc (where i have no problems about permissions), when i perform an action it shows me an error message, when i perform the SAME action with the SAME parameters it produce a wrong result and finally if i perform the action another time it produce the right result and the same is for the following times!

How could it be possible ?!?!?!?!?

Please answer me soon, because i have to resolve everything in 3 hours at the most :(
Thanks...

I realized that every times i turn off my program it gets the new information from the database, so i though that is an updat problem and is no my program fault. How could i solve this?????

And after other attempts if i clean the temp folder sometimes it works without problems...

I'm going mad... :(

As I know in windows 7 for %program files% there are privileges changed as it was in XP,I don't use Inno but you better ask in one of Inno group discussion :
http://www.jrsoftware.org/newsgroups.php

Hello MThaste,

Since this question is related to Inno Setup, rather than directly to VB.Net, I am going to move the thread to the application deployment forum, which is where questions on this topic live.

Let me know if you have any questions regarding this.

Thanks

Gary