Armor 88?
Only guessing: if 88 is the item number, check whether you have Type - 8 ID- 88 in the item.kor/chs (whatever the protocol is) server file. If you do not have it, there is your answer. The other option to see what is going on is to run a website that supports these files and see what item will be rendered. The best option is to use item editor and see the reality and to take a proper action.
All visual things are related to the client. The server only does the logic, so to have a new item displayed properly you must add the skins in the client and all item stats in the item server file. If you can not add a new item to the client, then you can replace an existing one, but that is another story...