Superuser gets an error on execution

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Mobile

Android

I've rooted my android emulator. I used instruction from http://forum.xda-developers.com/showthread.php?t=682828 But when I used this code below I got an error. Code:

Runtime rt = Runtime.getRuntime();
try {
Process proc = rt.exec("su");
InputStream is = proc.getInputStream();
proc.waitFor();
Log.e("My", "------------"+proc.exitValue());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (InterruptedException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} 

Error:

09-28 14:36:43.965: ERROR/ActivityManager(62): ANR in com.ares (com.ares/.FileManager)
09-28 14:36:43.965: ERROR/ActivityManager(62): Reason: keyDispatchingTimedOut
09-28 14:36:43.965: ERROR/ActivityManager(62): Load: 0.21 / 0.34 / 0.36
09-28 14:36:43.965: ERROR/ActivityManager(62): CPU usage from 43950ms to 72ms ago:
09-28 14:36:43.965: ERROR/ActivityManager(62):   system_server: 3% = 1% user + 1% kernel        / faults: 229 minor 3 major
09-28 14:36:43.965: ERROR/ActivityManager(62):   qemud: 0% = 0% user + 0% kernel
09-28 14:36:43.965: ERROR/ActivityManager(62):   com.ares: 0% = 0% user + 0% kernel /   faults: 134 minor 4 major
09-28 14:36:43.965: ERROR/ActivityManager(62):   logcat: 0% = 0% user + 0% kernel
09-28 14:36:43.965: ERROR/ActivityManager(62):   adbd: 0% = 0% user + 0% kernel
09-28 14:36:43.965: ERROR/ActivityManager(62):   m.android.phone: 0% = 0% user + 0%  kernel / faults: 206 minor 1 major
09-28 14:36:43.965: ERROR/ActivityManager(62):   m.android.email: 0% = 0% user + 0% kernel / faults: 191 minor 6 major
09-28 14:36:43.965: ERROR/ActivityManager(62):   com.android.mms: 0% = 0% user + 0% kernel / faults: 165 minor 4 major
09-28 14:36:43.965: ERROR/ActivityManager(62):   .quicksearchbox: 0% = 0% user + 0% kernel / faults: 172 minor 3 major
09-28 14:36:43.965: ERROR/ActivityManager(62):   d.process.media: 0% = 0% user + 0% kernel / faults: 162 minor
09-28 14:36:43.965: ERROR/ActivityManager(62):   m.android.music: 0% = 0% user + 0% kernel / faults: 153 minor
09-28 14:36:43.965: ERROR/ActivityManager(62):   ronsoft.openwnn: 0% = 0% user + 0% kernel / faults: 139 minor
09-28 14:36:43.965: ERROR/ActivityManager(62):   ndroid.launcher: 0% = 0% user + 0% kernel / faults: 75 minor
09-28 14:36:43.965: ERROR/ActivityManager(62):   android.protips: 0% = 0% user + 0% kernel / faults: 191 minor
09-28 14:36:43.965: ERROR/ActivityManager(62):   roid.alarmclock: 0% = 0% user + 0% kernel / faults: 151 minor
09-28 14:36:43.965: ERROR/ActivityManager(62):   id.defcontainer: 0% = 0% user + 0% kernel / faults: 151 minor
09-28 14:36:43.965: ERROR/ActivityManager(62):   com.svox.pico: 0% = 0% user + 0% kernel / faults: 100 minor
09-28 14:36:43.965: ERROR/ActivityManager(62):   android.vending: 0% = 0% user + 0% kernel / faults: 75 minor
09-28 14:36:43.965: ERROR/ActivityManager(62):   ufou.android.su: 0% = 0% user + 0% kernel / faults: 41 minor
09-28 14:36:43.965: ERROR/ActivityManager(62):   events/0: 0% = 0% user + 0% kernel
09-28 14:36:43.965: ERROR/ActivityManager(62): TOTAL: 6% = 2% user + 4% kernel

What do I wrong?