Aerix - free unlock A2 platform

[JW3]

Action journal
10:17:39   Instructions
10:17:39   Please connect the phone via USB while holding 2-5…
10:17:39 . The action name is 'Unlock'
10:17:39 . The action started waiting for the user
10:17:48 . The action finished waiting for the user
10:17:48   Connecting via SEMC USB Flash Device (USB1) (ver. 2.2.0.2)
10:17:48   Connecting to the baseband...
10:17:48   Entering service mode...
10:17:49   Detected chipset: DB3150 P2B/R2A
10:17:49   Boot-ed via: EROM
10:17:49   EROM version: 1200-4341 SEMCBOOT R6A008
10:17:49 e This boot mode is not supported
10:17:49 w You must boot via ROM
10:17:49 e Failed!
10:17:49 . The action reported failure

Error code
# 536910AF005BDA74

Error details
---
2A 9E F8 C6 8F 9D 33 02 0B 36 E7 88 77 45 A5 0B 
DD 2D DF 2B 0F 4C 7D 78 4D 44 A0 1D F7 7D AB 56 
AD AE DF A6 C1 3C 2D 1E 95 18 29 0F D7 CC 05 E8 
83 71 D1 EA 91 D4 DC 15 CB 54 29 CE 07 2A B5 8A 
B3 84 CB 92 F3 9B 
---

Why it can not boot. On a2 uploader evrything works fine. Yes and i dont use gordan gate flash driver but i can use A2 uploader. If you install sony erricsson media manger you get the flash driver :) Or cant that one work with aerix?
And my software is unbranded

My question is how do I boot via ROM?