How long has it been swirling? Sometimes it takes as long as 10-15 minutes to boot up after a freshly flashed ROM.
If waiting doesn't work, clear your Dalvik cache and all. Maybe even a factory reset. That usually fixes it. Do this in your recovery manager.
If waiting doesn't work, clear your Dalvik cache and all. Maybe even a factory reset. That usually fixes it. Do this in your recovery manager.