Hello and my name is Eric... I started to use litestep for 1 years ago and i have also done some themes on my own bur i have a question that i never have understood.

Some themes i download does not work. LiteStep crash with some of the themes and some of them work without problems.

Can somebody help me? Please?

Somebody?

well you don't descript your problems much. tell what themes crash, when they crash, what error messages show up, what build are u running, what os u have etc...

Your problem may be answered in these threads

http://www.litestep.net/index.php?section=4&action=view&catId=2&id=1291
http://www.litestep.net/index.php?section=4&action=view&catId=1&id=1630