Can't login (admin + frontend)

Hi
My aMember is v4.3.6
I CAN login from my main laptop which usually used to log in, however, today, I noticed that I could NOT login from either my secondary laptop or my iPhone.
When I type correct ID/PW, it happens nothing. Just like refresh login page, no error, nothing changed. (In admin log, it says "logged in" even though I cant login)
When I type wrong ID/PW, error massage appears, as usual.

I googled and I checked that there is .htaccess file in my root directly.
My aMember Root URL is http://subdomain.mydomain.com/
My server directly is /home/<my ID>/public_html/<subdomain>
so I think the following .htaccess is correct

Code:

#  Sample Nginx rules configuration:
#  aMember rules (replace /amember to actual aMember Pro path from site root)
#
#      location ~* ^/amember/.*\.(js|ico|gif|jpg|png|css|swf|csv)$ {}
#      location ~* ^/amember/setup/index.php$ { try_files not-existing-file @php; }
#      location ~* ^/amember/js.php { try_files not-exiting-file @php; }
#      location ~* ^/amember/index.php$ { try_files not-existing-file @php; }
#      location ~* ^/amember/public.php$ { try_files not-existing-file @php; }
#
#      location ~* ^/amember/public { rewrite ^.*$ /amember/public.php; }
#      location ~* ^/amember/setup { rewrite ^.*$ /amember/setup/index.php; }
#      location ~* ^/amember { rewrite ^.*$ /amember/index.php; }
#
#  you must already have something like that in your nginx configuration:
#
#      location ~ \.php$ {
#          try_files not-existing-file @php;
#      }
#      location @php {
#        fastcgi_pass 127.0.0.1:9000;
#        include fastcgi_params;
#      }
#
#  it is necessary to have @php section, as it is referred by aMember rules, and
#  it must be located at bottom
#
#
<IfModule mod_rewrite.c>
    RewriteEngine on
# You may need to uncomment the following line if rewrite fails to work
# RewriteBase must be setup to base URL of your aMember installation without
# domain name
    RewriteBase /
    RewriteRule ^public public.php [L]
    RewriteRule ^js.php js.php [L]
    RewriteRule !\.(js|ico|gif|jpg|png|css|swf|csv|html)$ index.php
</IfModule>
 
<IfModule mod_php5.c>
#  php_flag magic_quotes_gpc off
</IfModule>

I am sure that my laptop and phone is Javascript and Cookie enabled.
My protection plugin is only new_rewrite and Single Session Login is enabled.

My browser is Google Chrome v34 (main/secondary/mobile)
I also tried Internet Explorer but still I can't login

Any ways to solve this issue?

Here is additional info.
.htaccess re-uploaded -> doesnt work (I tried both uncommented and commented on Line RewriteBase)
Log in from my main laptop(which I can still loggin) and make new admin account and try to login from secondary laptop -> cant login

Thanks

Problem Solved.
.htaccess doesnt load properly due to character set
/closed

Could you explain how you fixed it further?

I'm having a similar problem. Enter login and pass press the "login" button and nothing happens. Refresh the page and I'm logged in. I'm lost.

I submitted a support ticket yesterday as well.