I managed to start the unlocking process, and it stops showing the following log...

Code:
Action journal
21:50:14   Unlock network lock by reset
21:50:14   Unlocks the phone network lock by reset (up to OTP CID 53).
21:50:15   Operating system: Microsoft Windows 7 Ultimate Edition (build 7600), 64-bit
21:50:15   Application version: 0.15.2648 (beta)
21:50:15 . The action name is 'Unlock'
21:50:15   Selected phone type: K800
21:50:15   Selected connection method: USB ROM
21:50:15 i Instructions
21:50:15 i 1. Make sure the phone battery is charged to at least 50%.
21:50:15 i 2. Switch off the phone!
21:50:15 i 3. Remove the phone battery and wait at least 5 seconds before reinserting it!
21:50:15 i 4. Press and hold buttons 2 and 5, then connect the cable to the phone!
21:50:15 . The action started waiting for the user
21:51:20 . The action finished waiting for the user
21:51:20   Connecting via Generic EMP USB Flash Device (USB3)...
21:51:20   Device driver version: 2.2.0.5
21:51:20   Entering baseband CPU service mode...
21:51:20   Detected chipset: DB2020 '9900
21:51:20   Boot mode: ROM
21:51:20   Sending loader...
21:51:20   Waiting for loader response...
21:51:20   Flash chip manufacturer: Intel®
21:51:20   Flash chip ID: 897E
21:51:20   IMEI: 35399601661996
21:51:20   OTP CID: 49
21:51:21   OTP area status: Locked
21:51:21   Product type: Retail
21:51:21   Effective CID: 49
21:51:21   Effective color: Brown
21:51:21   Restarting the phone...
21:51:23 i Instructions
21:51:23 i 1. Make sure the phone battery is charged to at least 50%.
21:51:23 i 2. Switch off the phone!
21:51:23 i 3. Remove the phone battery and wait at least 5 seconds before reinserting it!
21:51:23 i 4. Press and hold buttons 2 and 5, then connect the cable to the phone!
21:52:02   Connecting via Generic EMP USB Flash Device (USB3)...
21:52:02   Device driver version: 2.2.0.5
21:52:02   Entering baseband CPU service mode...
21:52:02   Detected chipset: DB2020 '9900
21:52:02   Boot mode: ROM
21:52:02   Sending loader...
21:52:02   Waiting for loader response...
21:52:03   Waiting for loader response...
21:52:18 e Failed!
21:52:18 . The action entered shutdown phase
21:52:18 . The action reported failure

Error code
# 53A06C95A178992D

Error details
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14 FD 79 39 4C A8 0C 3B DA 4D 50 7A D6 E5 EC 71 
61 6E 96 08 8E C7 1C 7F E1 93 64 9E 14 40 DC B3 
7E 7F 93 90 6C D8 82 3A 46 5D D0 FB B4 3A 38 94 
A0 5A A8 B7 6E 2D 3F 39 DC A7 8E BE DA 41 44 59 
29 49 A3 67 8C 48 4C 85 9A F7 FF 3D 2A E8 02 9C 
D2 E5 88 A7 B2 87 5C CB F6 CD 00 FF A8 4C 64 0D 
BE BB 88 A6 42 B7 94 E5 8C C5 BE 1D 8A B1 74 B3 
B2 7B 98 F3 C8 99 BA 2E 
---