I need help for makeing a door going to a cave i want.

i will be here for a while

please some one tell me

Whoa. First off, don't double, or in this case, triple post. Second, check out Alphadawg's Tutorial to help teach you the basics. It's a little old, but you should pretty much be able to follow it.

I have the same trouble and I did everything there too.

That tutorial's for 1.90.
For a dungeon, you'll have to set up a new door sombo set (Quest->Graphics->Door combos sets->New set). Place the doors you made in the correct areas.
Then, when you place doors, select the combo set that you made, and place doors as usual.

If you're using a cave dmap, it's easy. Just draw the doors on, and you're done. 😊
You'll need to use secret combos to open shutters, and set locked doors to lock block combos, though.