Rooting S4 mtk6575 failed

[testwater2]

---= SRS One-Click-Root v4.7 =---

1:45:17 PM - Starting ADB Server..
1:45:20 PM - Manufacturer: alps
1:45:20 PM - Model: GT-I9500
1:45:20 PM - Android Version: 4.2.2
1:45:21 PM - Build ID: ALPS.ICS2.MP.V1.39
1:45:21 PM - Board ID: mtk6517_ics2
1:45:21 PM - Chipset Platform:
1:45:21 PM - Getting OffSets.. : 0x8003 0xac57 (False)
1:45:22 PM - Query Server for Best Method.. Found Rootkit: 4

----= Start Rooting Process.. Please Wait =----

1:45:23 PM [+] Testing exploit: root4 (please wait..)
1:45:26 PM [+] Device Reboot #1 (Wait till it's started)
2:59:33 PM [+] Device Reboot #2 (Wait till it's started)
3:01:17 PM [+] Executing root4 exploit Failed.
3:01:17 PM [+] Testing exploit: root4b (please wait..)
3:01:23 PM [+] Device Reboot #1 (Wait till it's started)
3:02:55 PM [+] Device Reboot #2 (Wait till it's started)
3:04:43 PM [+] Testing exploit: root5 (please wait..)
3:04:49 PM [+] Unlock your device screen, it should bring up restore mode.
3:05:05 PM [+] Press RESTORE button on device NOW! then wait...
3:05:43 PM [+] Device Reboot #1 (Wait till it's started)
3:07:55 PM [+] Executing root5 exploit Failed.

3:07:55 PM Auto Root Failed on this device.
3:07:55 PM Rebooting Device and try again...

anyone able to guide or advise how to root it??