Make sure you Downloaded the Correct .dll , Just in Case re-Download > Here <
Remember to Put the File in your Combat Arms and System32 folder .
Make sure you read the error Precisely , because the error that you believe that it still popping up may be a totally different .dll error .
Also try ;
fixing your Registy ( CCleaner )
Use Different Injectors
And Always run your Hack / Injector as Admin if running on Window 7 / Vista .