[Sony Xperia P, U, Sola, Go] RASMIranda:
mount: permission denied (are you root?)

Trying to root my Xperia U, tried option one, followed instructions but it did not prompt any restore/backup options on the phone, got this:

C:\Root_with_Restore_by_Bin4ry_v31>RunMe
======================================================================
= This script will root your Android phone with adb restore function =
= Script by Bin4ry (thanks to Goroh_kun and tkymgr for the idea) =
= Idea for Tablet S from Fi01_IS01 =
= (18.06.2013) v31 =
======================================================================

Device type:
1) New Standard-Root (thx Ariel Berkman)
2) New Xperia Root by Goroh_kun (Xperia Z, Xperia V [JellyBean] ...)
3) Old
4) Old-Special (for example: Sony Tablet S, Medion Lifetab)
G) Google Glass Mode (thx Saurik for the ab file)

x) Unroot

Make a choice: 1
Please connect Device with enabled USB-Debugging to your Computer
Doing a Backup first, please confirm this on your device!
Now unlock your device and confirm the backup operation.
Done!
Press any key to continue . . .
Please select the RESTORE MY DATA option now on your device!
Now unlock your device and confirm the restore operation.
Please press any Key when restore is done.
Press any key to continue . . .
Going to reboot now ...
mount: Operation not permitted
2972 KB/s (380532 bytes in 0.124s)
2344 KB/s (1500495 bytes in 0.624s)
2207 KB/s (1165484 bytes in 0.515s)
remote object '/system/bin/ric' does not exist
.
Going to copy files to it's place
mount: permission denied (are you root?)
Rebooting again, please wait!
Could Not Find C:\Root_with_Restore_by_Bin4ry_v31\ric
Restoring previous Backup! Please select the RESTORE MY DATA option now on your device!
Now unlock your device and confirm the restore operation.
Please press any Key when restore is done.
Press any key to continue . . .
Going to reboot last time now ...
You can close all open command-prompts now!
After reboot all is done! Have fun!
Bin4ry
Press any key to continue . . .

C:\Root_with_Restore_by_Bin4ry_v31>

No superuser app installed, and phone is not rooted!

Also tried option 3 and got this, following all the instructions, this time it did prompt on the phone to restore:

C:\Root_with_Restore_by_Bin4ry_v31>RunMe
======================================================================
= This script will root your Android phone with adb restore function =
= Script by Bin4ry (thanks to Goroh_kun and tkymgr for the idea) =
= Idea for Tablet S from Fi01_IS01 =
= (18.06.2013) v31 =
======================================================================

Device type:
1) New Standard-Root (thx Ariel Berkman)
2) New Xperia Root by Goroh_kun (Xperia Z, Xperia V [JellyBean] ...)
3) Old
4) Old-Special (for example: Sony Tablet S, Medion Lifetab)
G) Google Glass Mode (thx Saurik for the ab file)

x) Unroot

Make a choice: 3
Checking if i should run in Normal Mode or special Sony Mode
Please connect your device with USB-Debugging enabled now
Waiting for device to shop up, if nothing happens please check if Windows ADB-drivers are installed correctly!
1314 KB/s (210390 bytes in 0.156s)
remote object '/system/bin/ric' does not exist
.

Found Sony Backup-Restore.apk
LT26,LT22 etc. mode enabled!

.
Pushing busybox....
2349 KB/s (1165484 bytes in 0.484s)
Pushing su binary ....
2162 KB/s (380532 bytes in 0.171s)
Pushing Superuser app
2131 KB/s (1500495 bytes in 0.687s)
Making busybox runable ...
.
Pushing fake Backup
1152 KB/s (73728 bytes in 0.062s)
Extracting fakebackup on device ...
Watch now your device. Select the backup named RootMe and restore it!
Starting: Intent { act=android.intent.action.MAIN cat=[android.intent.category.LAUNCHER] cmp=com.sonyericsson.vendor.backuprestore/.ui.BackupActivity }
If all is successful i will tell you, if not this shell will run forever.
Running ......

Good, it worked! Now we are rebooting soon, please be patient!
Waiting for device to come up again....
Going to copy files to it's place
mount: permission denied (are you root?)
GOTO was unexpected at this time.

C:\Root_with_Restore_by_Bin4ry_v31>

No superuser app installed, and phone is not rooted!

First time rooting so i can install a costum JB ROM (this one).

Any help will be much appreciated!