Yeah, for some reason its a little more labor intensive to send ACT scores to CSU than it is SAT scores. First, you have to send one college your score directly from ACT (perhaps send it to your first choice). Once that school receives it then you can go to CSU Mentor and use the scores manager to release it to any other CSU. For whatever reason at least one school has to receive the score and put it in the system before you can use the scores manager to release it CSU wide.
The scores manager will be found on CSU Mentor under college planning/admissions testing/ACT scores. Once you put it in scores mgr. you'll be able to see when each college downloads the info.