Try updating to the new 3.6 version of WordPress, it may help.
thanks very much!!! oh gosh!!! it works again.
@ WPyogi thanks for your advice, i was not planing to pay for a host, at least not right now, because i’m quite new here, don’t want to waste money before i really get along with it.
but thanks!
i changed the code, but it didn’t work at all.
i’m using 000webhost free account, and it seems like i could not change PHP memory setting.
what should i do?