The warning is just that - a warning. So you didn't incur any infraction points. Just a reminder to be mindful as the next time will lead to an infraction. Each infraction has a set number of points associated with it. When you reach 15 points, you incur a ban. You can find a full description of the infractions and the points associated with them in this thread:
http://www.cricketweb.net/forum/site-discussion/49415-forum-rule-changes-including-introduction-infraction-system.html
http://www.cricketweb.net/forum/site-discussion/49415-forum-rule-changes-including-introduction-infraction-system.html