I am having trouble trying to root my Acer Iconia A100 with Android 4.0.3.  I have tried several rooting methods and they always fail.

I have the USB debug enabled, and all the adblock or antivirus apps are off.

I've tried both of these:

 - http://www.srsroot.com/
 - http://www.kingoapp.com/

Am I just missing a step somewhere?

Here is the report from the SRSroot app:

    ---= SRS One-Click-Root v5.1 =---
    
    11:29:11 AM - Starting ADB Server..
    11:29:16 AM - Manufacturer: Acer
    11:29:16 AM - Model: A100
    11:29:16 AM - Android Version: 4.0.3
    11:29:16 AM - Build ID: Acer_AV041_A100_1.049.00_PA_CUS1
    11:29:16 AM - Board ID: vangogh
    11:29:16 AM - Chipset Platform: tegra
    11:29:16 AM - Getting OffSets.. : 0xd9f0 0xaf47 (True) 
    11:29:17 AM - Query Server for Best Method.. Found Rootkit: 4
    
    	----= Start Rooting Process.. Please Wait =----
    
    11:29:17 AM [+] Testing exploit: root8 (please wait..)
    11:29:39 AM [+] Executing root8 exploit Failed. 
    
    11:29:39 AM Auto Root Failed on this device. :( 
    
    11:29:39 AM Rebooting Device and try again... 

On the Kingo, when I run the Windows application to root the android it always says that rooting was successful, but when I try to do anything that requires root (like installing busybox) on the android, it always fails.  Then when I restart the android the rooting is gone.