error RF017

Sorry for my bad English, I'm using google

I changed the texture to change the M4A1, but when I enter the game gives me an error of rf017.

how can I fix this?

Use a bypass, such as the one from G-Force Hydra

Using G-Force's Bypass without hacking trial detected>
1. Log in
2. Wait about 30-40 seconds
3. Enter a server, then go back to the server selection
4. Wait about 30 seconds
5. Enter server/channel enjoy ^-^

this is a hack, there would be another way?