[bstanko6]

Go into silent hunter \ data \ .cfg. You want commands_en or den if you are German.

Using notepad, select edit and select 'find' type 309. At least for me it is 309. This leads you to open tube doors command. The original coders turned this off with a ';' in front of the commands. Delete the ';' then go to 312 and delete those as well. Save this and It should allow you to open close tube doors.

If this is not the problem, and you are using a Gui like magui or OLC, then you have to go into those mods cfg and do the same for commands_en there.

If that works let me know.

Note that if you are using a gui then both commands_en for game and gui must be edited as I mentioned above. Hope that works. Also, if you turn on and off whatever gui you are using, this resets the editing you did. You will have to do this again.