These kicks are when PunkBuster detects a modification of your game exe running in memory or you are using a modified client. Possible explanations are as follows:
1. A virus modified the game executable
2. A crack of some sort was applied to the game executable
3. You are using a non-standard version of the game (D2D/Steam etc.)
Please make sure you run the latest and original version of the game. Using no-cd cheats could be the cause of these kicks. Make sure you have installed the latest patches of your game.