Cannot open source file, Error

[DonovanPhoenix]

Hello im using Visual Micro with Visual Studio.
I cannot compile because the IDE is telling me thare is missing source files. i have confirmed that they do exist, and i only have problems with this library.I have no idea what is wrong.

The problem is in
UIPclient.h

 #import "Client.h"
 #import "utility/mempool.h"
 #import "utility/uip.h"

UIPserver.h

 #import "Server.h"
 #import "UIPClient.h"

the error for the above is eg.

cannot open source file "(project_dir)/UIPClient.tlh"
cannot open source file "(project_dir)/Client.tlh"
cannot open source file "(project_dir)/Server.tlh"

and in script this function is not working
client.println("DATA from Client");

class "UIPClient" has no member "println"

here is some screen shots.
https://i.imgur.com/WcPgM77.jpg
https://i.imgur.com/WcPgM77.jpg
https://i.imgur.com/WcPgM77.jpg