Having Trouble While Installing Sql Mobile 3.0 On WM5

Hi,

In order to deploy a corporate application on WM 5 devices, I've built an autorun.exe that performs some calls to wceload.exe to install cab files.

Everything is installing correctly, except SQL Mobile 3.0 (and its replication library). Here is the files the autorun.exe installs :
compact framework 2.0 SP1 (NETCFv2.wm.armv4i.cab)
french strings (System_SR_FR.cab)
Sql mobile 3.0 (sqlce30.ppc.wce5.armv4i.CAB)
Sql Mobile 3.0 replication (sqlce30.repl.ppc.wce5.armv4i.CAB)
and also app cabs (app.cab, app2.cab, etc...)

The command line I execute in the autorun.exe is this one :

wceload.exe fullpath_to_cab_file.cab /silent

when I run this command line, I get no error (exit code of wceload.exe is 0).
Bu when I run the application (a C# app) I get an error that one the assembly cannot be loaded.
A further investigations later, I discovered that if I install sql mobile (the two cab files) by clicking on the cab on the device through files explorer, not only I get no error while installing, but also the application works correctly.

So I have two questions :
1. what can be possible reasons that make the autorun.exe fails to install Sql Mobile ?
2. In a more general way, how can I correctly handle wceload errors ?

FYI, I don't care about certificates, since the chosen device is a device where the security has been turned off.
Another precision : the final users won't have access to a computer to deploy the app. That's why I choose to use an autorun.exe file.

Thanks in advance,
Steve