No texture showing up in doors

[Gothic Box]

I just started mapping and I'm having trouble with door textures. For some reason doombuilder won't let me set the linedef to not have a middle texture, making it look like this when it opens:
http://imgur.com/2ZpGchy
Thanks in advance.

[esselfortium]

Having no texture is specified by - rather than by a blank space. This might be your problem.

[Gothic Box]

esselfortium said:

Having no texture is specified by - rather than by a blank space. This might be your problem.

Yes it was. Thank you very much.

[SavageCorona]

Try right-clicking on the middle texture so it sets it to have no texture then set the texture on the higher section of the door (Assuming you made the door correctly out of a 0 height sector).