Clan castle during attack

During a clan war, sometimes I can't use my full clan castle during an attack. It doesn't even show up in my line up during the attack. How can I use it during attacks.
Best Answer
If you have troops in you clan castle you should be able to deploy them. They have your clan's flag as icon during battle. If you are not able to deploy them it is possible you have been attacked and lost all your troops there. Possibly without noticing/realizing.
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Can you use clan castle during war?
The Clan Castle in your War Base is different from the Clan Castle in your village and must be filled with donated troops separately. The troops donated to a War Base will be used to defend it against all attacks during the War, so be sure to request troops that you feel will work well with defending your layout.Do Clan Castle troops defend in war?
Best Clan Castle Troops for Every Town Hall Level in Clash of Clans!
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Answer 2
I suspect the problem is a simpler issue than others think... if you have too many different KINDS of troops, you may have to scroll right on your troop attack bar to find all of your troops. Spells usually show up on the right and I have paniced myself when I couldn't find that one spell I really needed.
So... try scrolling right (or left) on your attack bar.
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