If it is not working for you (either the z4root itself or the apk is not copied) -
please run z4root, dont press the 'root' button, connect the device to a pc and run "adb logcat", wait until all the log is shown, press on the device the "root" button, and paste here the relevant logcat messages.
I/Exec ( 2726): JNI_OnLoad
I/AAA ( 2726): Got processid: 2737
I/ActivityManager( 1908): Displayed activity com.z4mod.z4root/.Phase1: 278 ms (t
otal 278 ms)
I/AAA ( 2726): $ chmod 777 /data/data/com.z4mod.z4root/files/rageagainstthec
age
I/AAA ( 2726): /data/data/com.z4mod.z4root/files/rageagainstthecage
I/AAA ( 2726): $
I/AAA ( 2726): [*] CVE-2010-EASY Android local root exploit (C) 2010 by 743C
I/AAA ( 2726):
I/AAA ( 2726): [*] checking NPROC limit ...
I/AAA ( 2726): [+] RLIMIT_NPROC={1344, 1344}
I/AAA ( 2726): [*] Searching for adb ...
I/AAA ( 2726): [+] Found adb as PID 2704
I/AAA ( 2726): [*] Spawning children. Dont type anything and wait for reset!
---------------------------------------------
I/AAA ( 2726): [+] Forked 1335 childs.
I/BBB ( 2726): FORKED FOUND!
---------------------------------------------
I/AAA ( 4081): Starting
D/dalvikvm( 4081): Trying to load lib /data/data/com.z4mod.z4root/lib/libandroid
term.so 0x43cc5018
D/dalvikvm( 4081): Added shared lib /data/data/com.z4mod.z4root/lib/libandroidte
rm.so 0x43cc5018
I/Exec ( 4081): JNI_OnLoad
I/AAA ( 4081): Got processid: 4089
I/AAA ( 4081): id
I/AAA ( 4081): #
D/asset ( 4081): Data exceeds UNCOMPRESS_DATA_MAX (1062992 vs 1048576)
W/System.err( 4081): java.io.IOException
W/System.err( 4081): at android.content.res.AssetManager.readAsset(Native Met
hod)
W/System.err( 4081): at android.content.res.AssetManager.access$700(AssetMana
ger.java:35)
W/System.err( 4081): at android.content.res.AssetManager$AssetInputStream.rea
d(AssetManager.java:540)
W/System.err( 4081): at com.z4mod.z4root.Phase2.SaveIncludedFileIntoFilesFold
er(Phase2.java:237)
W/System.err( 4081): at com.z4mod.z4root.Phase2.dostuff(Phase2.java:175)
W/System.err( 4081): at com.z4mod.z4root.Phase2$1.run(Phase2.java:38)
I/AAA ( 4081): chmod 777 /data/data/com.z4mod.z4root/files/busybox
I/AAA ( 4081): /data/data/com.z4mod.z4root/files/busybox mount -o remount,rw
/system
I/AAA ( 4081): /data/data/com.z4mod.z4root/files/busybox cp /data/data/com.z
4mod.z4root/files/su /system/bin/
I/AAA ( 4081): /data/data/com.z4mod.z4root/files/busybox cp /data/data/com.z
4mod.z4root/files/SuperUser.apk /system/app
I/AAA ( 4081): /data/data/com.z4mod.z4root/files/busybox cp /data/data/com.z
4mod.z4root/files/busybox /system/bin/
I/AAA ( 4081): chown root.root /system/bin/busybox
I/AAA ( 4081): chmod 755 /system/bin/busybox
I/AAA ( 4081): chown root.root system/bin/su
I/AAA ( 4081): chmod 6755 /system/bin/su
I/AAA ( 4081): chown root.root /system/app/SuperUser.apk
I/AAA ( 4081): chmod 755 /system/app/SuperUser.apk
I/AAA ( 4081): rm /data/data/com.z4mod.z4root/files/busybox
I/AAA ( 4081): rm /data/data/com.z4mod.z4root/files/su
I/AAA ( 4081): rm /data/data/com.z4mod.z4root/files/SuperUser.apk
I/AAA ( 4081): rm /data/data/com.z4mod.z4root/files/rageagainstthecage
I/AAA ( 4081): uid=0(root) gid=10053(app_53)
I/AAA ( 4081): echo "reboot now!"
I/AAA ( 4081): #
I/AAA ( 4081): sync
I/AAA ( 4081): sync
I/AAA ( 4081): reboot
I/AAA ( 4081): #
I/AAA ( 4081): /data/data/com.z4mod.z4root/files/busybox: text busy
I/AAA ( 4081): #
I/AAA ( 4081): /data/data/com.z4mod.z4root/files/busybox: text busy
I/AAA ( 4081): #
I/AAA ( 4081): /data/data/com.z4mod.z4root/files/busybox: text busy
I/AAA ( 4081): #
I/AAA ( 4081): /data/data/com.z4mod.z4root/files/busybox: text busy
I/AAA ( 4081): #
I/ActivityManager( 1908): Displayed activity com.z4mod.z4root/.Phase2: 1502 ms (
total 1502 ms)
I/AAA ( 4081): Unable to chmod /system/bin/busybox: No such file or director
y
I/AAA ( 4081): #
I/AAA ( 4081): Unable to chmod /system/bin/busybox: No such file or director
y
I/AAA ( 4081): #
I/AAA ( 4081): Unable to chmod system/bin/su: No such file or directory
I/AAA ( 4081): #
I/AAA ( 4081): Unable to chmod /system/bin/su: No such file or directory
I/AAA ( 4081): #
I/AAA ( 4081): Unable to chmod /system/app/SuperUser.apk: No such file or di
rectory
I/AAA ( 4081): #
I/AAA ( 4081): Unable to chmod /system/app/SuperUser.apk: No such file or di
rectory
I/AAA ( 4081): #
I/AAA ( 4081): #
I/AAA ( 4081): rm failed for /data/data/com.z4mod.z4root/files/su, No such f
ile or directory
I/AAA ( 4081): #
I/AAA ( 4081): rm failed for /data/data/com.z4mod.z4root/files/SuperUser.apk
, No such file or directory
I/AAA ( 4081): #
I/AAA ( 4081): # reboot now!