You put way too much detail in these. Remember they will be 64x64 and half of the stuff won't be visible, just make colors look bad.
Your green shield, for example: background becomes grey-green mess.
Static purge becomes so dark you can barely tell what's on the icon, which defeats its...
Title says it all. Just made these while I had nothing better to do, I was wondering if it'd make sense to make any more. It would suck to make something nobody's gonna use, right?
Plus, there's something on these that bothers me, just can't point it out.
Try checking icon names. You may have a typo in your DIS icon. Also check if your disabled icons are in ReplaceableTextures\CommandButtonsDisabled\ folder.
If everything is fine, icon may not have alpha channel, it causes green squares sometimes.