Thank you very much for your comments Armando - you are very sweet. I had to replay it quite a few times to remember how on earth I did it
When you say you "doused the flames" and entered the blue TP from the right - that is wrong! You must never enter the blue TP. If you see the screenshot - you must get the first four z-bots to douse the flames and the next four to keep going around the blue TP. This blocks the TP.
There are 9 Z-bots in total (4 for the flames, 4 for the TP) The last one z-bot must be kept circling around the level to keep the conveyor timer switch activated for you to place a grey box on the red button.
You can then get rid of the circling z-bot by using a grey box and water tile (top middle).
You can then bring the barrel to the blue TP (see screenshot). Push the barrel onto the blue TP and stand back quickly but do not follow it. This will kill the remaining z-bot and allow you to enter the red TP from the top.
Hope that helps. It was quite a hard level - I am sorry. Please ask again if you don't understand.
Good luck

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