Failed to Unlock Bootloader Prior to Flashing Cyanogenmod (Softbrick?)

[Knin]

I did as is stated in the title of this thread and now my phone displays this screen (http://i45.tinypic.com/27y2tmd.jpg) upon standard boot.
Booting into Download mode and attempting to flash stock 4.3 firmware using Odin 3.07/3.09 returns the error, "SECURE CHECK FAIL : PIT"

Kies
Kies accepts the input of a serial number and ID number, then proceeds to download the latest firmware for my SCH-I545. However, upon completion of downloading, Kies dims (black filter) then does nothing (I've left it alone for several minutes in case it IS actually doing something).

ODIN Log
<ID:0/004> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> SCH-I545_MDK_562219_Stock_Restore.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/004> Odin v.3 engine (ID:4)..
<ID:0/004> File analysis..
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Set PIT file..
<ID:0/004> DO NOT TURN OFF TARGET!!
<ID:0/004> FAIL!
<ID:0/004>
<ID:0/004> Re-Partition operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)


I have no idea how to fix this, please help if you can.
EDIT: It suddenly started working, but why?

Phone Info
Samsung Galaxy S4
Carrier: Verizon Wireless
Serial Number: SCH-I545
Android Version: 4.3
Previously Rooted?: Yes

 

[paintdrinkingpete]

I did as is stated in the title of this thread and now my phone displays this screen (http://i45.tinypic.com/27y2tmd.jpg) upon standard boot.
Booting into Download mode and attempting to flash stock 4.3 firmware using Odin 3.07/3.09 returns the error, "SECURE CHECK FAIL : PIT"

Kies
Kies accepts the input of a serial number and ID number, then proceeds to download the latest firmware for my SCH-I545. However, upon completion of downloading, Kies dims (black filter) then does nothing (I've left it alone for several minutes in case it IS actually doing something).

ODIN Log
<ID:0/004> Added!!
<OSM> Enter CS for MD5..
<OSM> Check MD5.. Do not unplug the cable..
<OSM> Please wait..
<OSM> SCH-I545_MDK_562219_Stock_Restore.tar.md5 is valid.
<OSM> Checking MD5 finished Sucessfully..
<OSM> Leave CS..
<ID:0/004> Odin v.3 engine (ID:4)..
<ID:0/004> File analysis..
<ID:0/004> SetupConnection..
<ID:0/004> Initialzation..
<ID:0/004> Set PIT file..
<ID:0/004> DO NOT TURN OFF TARGET!!
<ID:0/004> FAIL!
<ID:0/004>
<ID:0/004> Re-Partition operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)


I have no idea how to fix this, please help if you can.
EDIT: It suddenly started working, but why?

Phone Info
Samsung Galaxy S4
Carrier: Verizon Wireless
Serial Number: SCH-I545
Android Version: 4.3
Previously Rooted?: Yes

You'll probably get better answers if you take this question over to XDA.

One thing though, if you have a Verizon GS4 and it has been updated past the original firmware (MDK), there is no way to install custom recovery and as such, no way to install custom ROMs except for SafeStrap method (and even then, Safestrap only supports *SOME* Touchwiz ROMs, there is no way to install AOSP ROMs, like CM, on most Verizon GS4s)