is there something wrong with 5idm.com site i can't go on it

My guess would be they either moved to new website or maybe it's been taken down.

then is there other websites i can read on Japanese

I use this one:
http://www.77mh.com/danmei/index.html

Thank you!

http://www.ffmanhua.com/

Those are both Chinese scanlation sites aren't they?...