Ok I Added A Weapon To A Dropship, Changed The Weaps Sprite, And Named The Attack, And Ran The MPQ And It Wont Attack.
Ive Even Tried Setting All The AI Orders To Attack And All It Does Is Go To The Top Left Corner.
The MPQ Is Attached So Could Sum1 Tell Me Whats Going On?
Addition: Wtf Wheres The Attachment?
you should make an attack button that would be smart sorry i cant help you

you should look at the button Tutorial i dont know whare it is and you need memgraft or some thing like that
Make sure it has an attack animation in the Iscript.bin file. You won't need Memgraft, it will have an attack button if it is properly given the weapon.
No, it will not.
Set all the AI's to attack?
Don't.
Look at a Marine's ai's, and just set the Dropship's to the same.
Even then, to get it to attack, you'll need to hold position or patrol.
Well, there's another way, but it's my secret. MIIIINE!
... Ive Tried The Same Actions As Any Attacking Unit But I Had No Idea I Had To HP To Make It Attack

Have you added a modified iscript entry? Units like the Dropship don't have attack animations.
as ezday281 said, copy the marine ai, also make an attack animation using frame 0