Getting error "attempt to index function with 'InvokeServer'"?[SOLVED]

This function here is supposed to invoke a remote function, but it gives the error as seen in the title. I don't have any idea why, so I'm just going to write down the server and client scripts.

-- local script
local bodytype = nil
function checkbodytype()
	bodytype = checkbodytype:InvokeServer(tool)
end

-- server script
repstorage.RemotesUMP.CheckBodyType.OnServerInvoke = checkbodytype

Nevermind, the RemoteFunction's name was the same as the function's name, and it was trying to :InvokeServer on the function.