S550TL unlock Problem with GC Prokey

Someone can help me with this problem trying to unlock S550TL with GcProkey

Using Version...1.0.0.0062
Selected Port SAMSUNG Mobile USB Modem #321 COM248
Selected Model GT-I5500
Selected Task SAMSUNG Exynos Unlock

SAMSUNG Exynos Unlock started...
Searching phone...

Phone Found Please Wait...
Model := S550TL
Ver := S550TLUDU1APG1/S550TLTFN1APG1/S550TLUDU1APG1/S550TLUDU1APG
SN := RV8H90GYQA
IMEI := 35957807100842
UNIQID := CQN00BADD68066

!!! Phone is in offline !!! ACCEPT CONNECT IN PHONE OR RECONNECT...
Device Detected...
SELinux := Enforcing
model:= SM-S550TL
ANDROID-ID = 4200badd68066397_0000F697F9
Local scu-db found..
Fail to read NVSIZE..fYxbCoAwDASv1GjMtp8+2mvs/W9hkoIggjCUzRRGCxUUbtRc88XO5QywEHO0NCPOkM5F9ByFnQc HpXqoecpYCRegyavbovzFLFOP8eaaxsFvXOITegM=
Unsupported baseband for code read...
Unsupported Device fail to answer nv details..
Unsupported Device..

!!! Fail !!!!
Total Time Take...00:00:07