-- Ditch your texture.txd in the main resource folder that you just created.
Your folder in Resources should contain:

-meta.xml
-texture.txd
-server.lua

Make sure you run your resource ;)

-- Below is the meta.xml file in your new folder
<meta>
    <script src="server.lua" type="server" /­>
    <file src="texture.txd" />
</meta>

-- Below is the server.lua file in your new folder

local filelocation = "texture.txd" -- replace this

addEventHandler("onResourceStart", resourceRoot, function ()
    local txdmodel = engineLoadTXD ( "models/office_floors.txd" )
    local success = engineImportTXD ( txdmodel, 11453)
    if success then
        outputConsole("Mod loaded!")
    else
        outputConsole("An error has occured while loading the mod!")
    end
end)