you are not alone, i have the same problem, right now, i am not using a lock screen password , my phone is open.
where did you get the mini lock screen that u installed?
i recently installed mini v 4 2.3.30 . its a great ROM and i love it. i had installed many versions of android 4.0 but i had to remove them due to issues. the issue I'm having with this is that it crashes whenever i set a lock screen pin or password or pattern. if i remove the security, it work...