Question mark issue when paragraph

Hello,

Now i am using ck editor for website.. I am facing problem.. In between paragraph i am getting QUESTION MARK (?)... 

If any one help me to fix this issue

Regards,

sample : 

<textarea name="signup_email" id="signup_email"><?php echo $signup_email;?></textarea>

var editor = CKEDITOR.replace( 'signup_email' );