Mega packs not working, still have many errors, help would be appreciated.

[Chernobyl]

I downloaded all 3 mega packs, put them into garrysmod garrysmod folder and still nearly half of the players on the server are flashing ERROR's. Any help would be much appreciated otherwise i think i'll just give up on this serious RP server.

 

[Chernobyl]

Now everytime i even try to join the server, gmod crashes. Great.

 

[Ves]

Check if you have your custom downloads on in your options menu on GMOD.

 

[Servo Ten]

Also I'm pretty sure the packs themselves are pretty dated. I'm not sure by how much but if "half the players" aren't showing up, is it just the custom ones that aren't or are some actually showing?