The iFolder Server that I’m using is at version 3.5, and a Windows iFolder Client version 3.4 will will work quite fine with it.

However, the iFolder Client for Windows XP might not work on some machine, upon launch it will complain that iFolder client service is not been able to start [i]“Object reference not set to an instance of an object.”[/i]

I suspect it was the simias webservice is having trouble, after struggle for 3 days, involving getting the iFolder source code and debugging it, and I realize a few characteristic when the iFolder Client will fail, if iFolder Client failed to operate on your machine, you can try the following:

BEFORE installing iFolder Client on WinXP (if you already did install it, uninstall and reboot you machine, clean up all files related to iFolder Client), then follow the following steps.

1. If you installed iFolder Client before, search for the word “simias” in C:\Documents and Settings\ and delete any folder found.
2. Uninstall any firewall and Antivirus program from your machine. (it wont work if you just disable them, I was using Comodo Firewall and Antivir)
3. Uninstall .NET 2.0 from your machine. (iFolder Client was made under .NET 1.1)
4. Restart machine. (MUST)
5. Then only now you install iFolder Client.

With lots of luck, the iFolder Client might just work, I manage to get it work on two of my laptop with the above steps, but not on my desktop machine… argh!

Another interesting fact is that it will guarantee to work if you install in on a fresh machine, like a new machine that just freshly installed with WinXP with SP2, without any hassle… After that, you can put back all your antivirus / firewall / .NET 2.0 / World Of Warcraft… etc