Trouble with Fences!

I installed the "free" version of Fences to see if the program works well before I buy it.  Unfortunately, everytime I reboot the icons are shuffled all over the desktop.  Fences clearly doesn't work for me.  If someone has any advice I would really appreciate it.

My system configuration is:

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System Information
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Time of this report:     3/18/2010, 01:21:48
       Machine name:    PICO-4331E12352
   Operating System:   Windows XP Professional (5.1, Build 2600) Service Pack 3 (2600.xpsp_sp3_gdr.091208-2036)
           Language:        English (Regional Setting: English)
System Manufacturer: XFX68L
       System Model:     XFX Nforce 680i LT
               BIOS:           Phoenix - AwardBIOS v6.00PG
          Processor:         Intel(R) Core(TM)2 Quad CPU    Q6600  @ 2.40GHz (4 CPUs)
             Memory:        2814MB RAM
          Page File:           941MB used, 3760MB available
        Windows Dir:       C:\WINDOWS
    DirectX Version:       DirectX 9.0c (4.09.0000.0904)

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Display Devices
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        Card name:   NVIDIA GeForce 8600 GTS
     Manufacturer:   NVIDIA
        Chip type:     GeForce 8600 GTS
         DAC type:     Integrated RAMDAC
       Device Key:     Enum\PCI\VEN_10DE&DEV_0400&SUBSYS_22801682&REV_A1
   Display Memory:  256.0 MB
     Current Mode:   1920 x 1080 (32 bit) (60Hz)
          Monitor:       ViewSonic VX2260wm SERIES
  Monitor Max Res:  1920,1080