Can't put salvage module in the shipyard

[Hikari no Kami]

I've been building a mining ship in the shipyard but i cant put the salvage module in it and it wont pull them either. I have more than enough of them but the shipyard says i have zero. All the other part are at 100%.

 

[Hikari no Kami]

Well i found out what was wrong. The shipyard computer didn't have enough cargo space.