I just install cs-cart 2.08 on October 27,2009. That’s ok can log in. But today I cannot log in. I can log in via link from password recovery latter (but if log out them I can’t log in again).
Please let me know… But if I’m not appreciate can I refund license? 
I’m not sure why this is happening. The only thing I can think of would be that your database user permissions are not set correctly. You can check this on your server in MySql databases set up.
If I set permissions are not correctly. Why can I still install it?
Good point so you might check your cookies