DT GAS TECH 500S ECU Connection Error at 80% Data Retrieval & Firmware GT504S-1.08.03 Issues

Hello.
I have a problem with connecting to the control panel, namely when I try to connect to the ECU at 80% of data retrieval, a pop-up error message pops up. but it connects for sure because the visualization works only that it breaks and nothing can be saved.
It all started with the fact that I wanted to do a calibration but I could not get the key, so I uploaded the new firmware GT504S-1.08.03
central:
GAS TECH 500S
GT01
on electronics v. 1.08
I tried with programs:
GAS TECH 500S v. 2.7.9 - the result as in the subject
GAS TECH 500S v. 2.6.0.0 - the result as in the subject
GAS TECH 500S v. 1.2.1.0 - no connection
GAS TECH 600S v. 2.20.6 - no connection
GAS TECH v. 2.21.30 - no connection

no ideas yet

I have the same center and exactly the same problem, have any ideas?

Added after 3 [hours] 54 [ minutes]:

 Hello again, I do not know how the author of the message came out but I finally managed to connect.
I downloaded a lot of versions from the web but it went off and after a few tries only on
GAS TECH v.2.21
What's even more interesting, I have an inscription on the control unit
GT500S while GT708S is displayed when connected
It is confirmed that D.T. it was constantly evolving experimental software and you do not know what's going on until the end.

@ JasomiT
What kind of firmware do you have?
Gas Tech 2.21. ?? ???

Finally it went with GAS TECH v. 2.21.30 and firmware GT504S-1.09.01 but I can not do the calibration while driving
and the next problem - by I have a bootloader version 5 so I can upload the latest 1.50 firmware but nothing like that
if there is someone in possession of another or a newer version of GAS TECH from 2.21.30, I am asking for an insert.

Here you will find instructions, diagrams, firmware and programs for regulating dt gas products. There are materials not only for the sequence: http://rapidshare.com/files/91995799/DTGas_Software.rar You can calibrate on the program at a standstill and also while driving.

Here is the newest GT-1.50.03 firmware I have and the installation adjustment program: http://rapidshare.com/files/138353086/GasTech-2.21.30.0.rar It is not possible to calibrate the station on it, but you can use it help freely set the display of the led amount of gas in the tank. I once had this problem, that with the full cylinder the last diode did not burn, now it's a problem.

As for the ECU 500s version, you can upload the firmware to 700s, e.g. GT-1.50.03 (404,704), remember that the third digit in "704", or "4", means the number of cylinders. Firmware with the designation 708 is up to 8 cylinders, etc.

Nothing can be done with this calibration. The control unit is programmed when it wants and how it wants that is, in a word d.t.gas is szmelc, I do not recommend !!!