wireless crash in android 4.3 and 4.4
it seems my problem was in my battery saver app (in this case 2x battery). i read a question in this site couple days ago. the problem of questioner was like me and he/she answer it, and said problem was from battery saver app. i think if i disable this option (wireless saver) it goes well. but just after disabling the hole app it fixed. for now i check it and i didn't have any problem. 
p.s: i really forget the title of that question or link of it. if i find that, i set it here for others.