By courtesy of R_Kelly:
The 150:30 error means licensing broke.
Two ways to fix this: If you are used to the Terminal app, you download the license recovery package and following instructions carefully, you use the python script in the package. Error "Licensing has stopped working" | Mac OS
If for some reason it doesn't, reinstall CS4 from your discs, or download the CS4 installer here.
Have your serial number ready.
If you have restored your data using Time Machine, then CS4 licensing has been messed up. You need to re-install CS4 and it should work fine then.