VCDC Firmware - Problem solving

I am stuck with communition with device. Please find the below information and pls guide on vdip commands sequence // 1) we used tool called [login to view URL] to modify the FTD file which you given to us and find the below changes in FW. Firmware Settings Firmware Version: 03.68-123 (Modified) Firmware Type: VCDC FTD Upgrader File for Main Code Default Monitor Settings: 115200 baud, 8 bits, 1 stop bit, no parity, no flow control Initial Mode: SCS, IPA, LED Flash at Power-on Options: Allow Firmware Upgrades, Allow Data Mode, Show Prompt, Show Device Connects/Removals, Show Version Report at Startup. // 2) Sensor device details FTDIBUS\COMPORT&VID_19CE&PID_9073 device name: SINUS SLM Tango (907.3) MANUFATURE SINUS Messtechnik GmbH Serial Settings of the device: Baud rate: 115200 Baud Data bits: 8 Bit Stop bits: 1 Bit Parity: None // 3) power up the VDIP1 module( board setting: DATAREQ# and DATAACK# left open. CTS# & RTS# connected together) Ver 03.68-123VCDCF On-Line:<CR> DD2<CR> // QP1 2B 0D [RX] - $00 $00 <CR> // QP2 2C 0D [RX] - $40 $00 <CR> //Query Device 85 20 40 00 0D [RX] - $01 $08 $81 $40 $02 $40 $00 $40 $01 $02 $00 $FF $FF $FF $CE $19 $73 $90 $00 $06 $01 $00 $00 $00 $00 $00 $00 $00 $00 $00 $00 $00 <CR> ><CR> // Firmware version 13 0D [RX] - <CR> MAIN 03.68-123VCDCF<CR> Command Failed RPRG 1.00R<CR> ><CR> // set FTDI 87 20 40 0D ><CR> // QP2 2C 0D [RX] - $01 $00 <CR> // Set Current 86 20 01 0D ><CR> //PULL down (GND) DATAREQ# TO ENABLE DATADODE and DATAACK# left open. CTS# & RTS# remain connected together. // Output after pull down the DATAREQ# <SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>`<SOH>` Device Removed P2