Hi Iosif
You need to pull back on the pressure a little. The platen needs to make contact with the tile, but not that much. Just needs to be enough for the tile to press into the silicon very slightly.
Also, you only need to use one piece of silicon rather than two. If printing the tile face up, place the silicon over the top of the tile.
If printing the tile face down, place the silicon on the bed of the press, the transfer print side up on the silicon, and finally the tile face down on the transfer.
I personally often find it easiest to decorate tile face down in the press. Works just as well (perhaps takes a minute or so longer – ie 200 degrees C for 4 to 5 minutes), and much easier to line up the image.
Hope this helps. If you are still struggling, feel free to get in touch with me.
Alex