N900t imei cert write error NEED HELP please..


hello im having issues with writing new cert to n900t its rooted and ive wiped efs and imei taped up the battery terminal but get in red write certificate failed right away? its like uart isnt even working or something?

Welcome to Octoplus/Octopus Box Samsung software version 2.2.0
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To connect SM-N900T phone you have to perform the following steps:
1. Disconnect USB cable from phone.
2. Go to Menu->Settings->More->About Device.
3.Tap on "Build number" 7 times to enable developer options.
4. Go to Menu->Settings->More->Developer options.
5. Turn on "USB Debugging" option.
6. Go to dial window.
7. Enter "*#0808#" number.
8. Select "DM+Modem+ADB".
9. Press Home button.
10. Restart phone.
11. Press "Read Info" in software.
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Platform: Samsung Android
Selected port: COM41
Selected model: SM-N900T
Phone was not found on the selected port!
Searching for USB diagnostic port…
No diagnostic ports found!
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Platform: Samsung Android
Selected port: COM117
Selected model: SM-N900T
Mode: Normal
Phone model: SM-N900T
Firmware compiled date: May 09 2014
Firmware compiled time: 20:00:00
Firmware released date: Nov 12 2014
Firmware released time: 18:56:26
Incorrect IMEI
SW version: M8974A-AAAANAZM-2.0.10059
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Platform: Samsung Android
Selected port: COM117
Selected model: SM-N900T
Mode: Normal
Phone model: SM-N900T
Firmware compiled date: May 09 2014
Firmware compiled time: 20:00:00
Firmware released date: Nov 12 2014
Firmware released time: 18:56:26
Incorrect IMEI
SW version: M8974A-AAAANAZM-2.0.10059
———————————————————————————–
Platform: Samsung Android
Selected port: COM117
Selected model: SM-N900T
Mode: Normal
Phone model: SM-N900T
Firmware compiled date: May 09 2014
Firmware compiled time: 20:00:00
Firmware released date: Nov 12 2014
Firmware released time: 18:56:26
Incorrect IMEI
SW version: M8974A-AAAANAZM-2.0.10059
———————————————————————————–
Platform: Samsung Android
Selected port: COM117
Selected model: SM-N900T
To Repair IMEI of the device, do the next steps:

1. Root the phone.
2. Perform Wipe Security procedure ("Repair Security/Wipe Security"
button).
3. Write Certificate ("Write Cert" button).
———————————————————————————–
Platform: Samsung Android
Selected port: COM117
Selected model: SM-N900T
Selected file: C:\Users\Dinuba-Wireless\Downloads\Cert-SM-N910F_
355324060515397 (1).cert
ADB server killed.
Detected phone model: SM-N900T
Firmware compiled date: Wed Nov 12 19:39:39 KST 2014
PDA version: N900TUVUENK3
CSC version: N900TTMBENK3
SW version: N900TUVUENK3
Phone SN: RV8FB0BHPBM
Android version: 4.4.2 (KOT49H)
Checking Root:
Phone is Rooted.
Checking Certificate file…
Certificate file successfully checked
Writing Certificate…
Writing new phone IMEI…
Checking certificate compatibility…
Certificate is not compatible
Writing Certificate failed
———————————————————————————–
Platform: Samsung Android
Selected port: COM117
Selected model: SM-N900T
Selected file: C:\Users\Dinuba-Wireless\Downloads\Cert-SM-N910F_
355324060515397 (1).cert
Perform the following steps:
1. Connect phone via UART cable to the Box.
2. Note: phone screen must be active
Connecting to phone, please wait…
Writing Certificate failed