TF2 server won't start
 

When downloading my TF2 Server it works perfectly fine, but whenever I add source and meta mod into the files and try to start the server, it just gives me a windows error message. I even tried a different approach by using the Server Manager made by Crazy, and though the same issue still stands, I can at least show you what I mean more clearly now, if someone could give me some information on to what just might be going on here, I would greatly appreciate it.

(Blurred text, is simply just the server name)
https://cdn.discordapp.com/attachmen...1w2stfaa51.png