Trains only goes to depot and back to original station

[ndefontenay]

Good morning,

I've just started with openTTD but I've been good to nothing so far.
I create a basic train line with 2 stations, A and B. Then I will attach a depot to that line and make sure that trains can reach it from both direction.
I add no signs at all.

I then create a new train and cargo. Here's what happens:
1) Train get out of depot
2) Train go to station A
3) Train go to depot
4) Train go to depot
etc...

Then I lose the game.

Systematically all my trains does the same thing. I don't understand why it's not going to station B. I thought it was suppose to go to deport only when servicing is required.

I'm desperate.

Thanks in advance for your help.

[DaleStan]

This is not Loco. Your trains need to have orders.