Andreas, you should contact Adobe Technical Support for help with issues like this. You are entitled to a certain number of free calls for "installation issues, basic usage questions, and troubleshooting unexpected behavior for documented features".
For information on what free technical support you're entitled to, see this page:
Ran into this problem today. I made sure to send a detailed report to Adobe. I have traced the problem to Red Giant Knoll Light Factory plugins. I am using the latest version 2.5.3.
Removing the plugins from the MediaCore folder allows CS4 to open again. I tried moving the KLF plugin folder to the AE CS4 Plugins folder instead and it opens, but as soon as you try to apply the filter, it crashes the same way.
I am wondering if the AE CS4 9.0.1 patcher will help things at all...
AE CS4 crashes on launch - Error 150:30, As soon as I open up a program, a window pops up saying I need to restart and to call my administrator or support person and mention a 150:30 error code? Can anyone help... I trying to learn AE with the 30 day trial on my Macbook, In one day i got this error not able launch the software... Please help me, thanks