Magento – Remove HTTPS auto redirect

I changed the secure options on Configuration -> Web 'use secure in frontend' and 'use secure in adminhtml' to 'yes' but it was not configurated yet. I cannot access the admin pannel from a browser because it redirects automatically to a https.

I tried to change via database with the commands:

UPDATE core_config_data
SET value=0
WHERE path='web/secure/use_in_frontend' OR path='web/secure/use_in_adminhtml' OR path='web/url/redirect_to_base';

And deleted the var/cache but nothing happens.

EDIT:

SELECT * FROMcore_config_dataWHERE path LIKE 'web/secure/use_in_frontend';
+-----------+---------+----------+----------------------------+-------+
| config_id | scope | scope_id | path | value |
+-----------+---------+----------+----------------------------+-------+
| 327 | default | 0 | web/secure/use_in_frontend | 0 |
+-----------+---------+----------+----------------------------+-------+
1 row in set (0.00 sec)

SELECT * FROMcore_config_dataWHERE path LIKE 'web/secure/use_in_adminhtml';
+-----------+---------+----------+-----------------------------+-------+
| config_id | scope | scope_id | path | value |
+-----------+---------+----------+-----------------------------+-------+
| 328 | default | 0 | web/secure/use_in_adminhtml | 0 |
+-----------+---------+----------+-----------------------------+-------+
1 row in set (0.00 sec)

But nothing had changed.

EDIT 2:

Some pages have a strange redirection pattern. For example: http://www.mywebstore.com/customer/account/login/ sends me back to http://www.mywebstore.com/.

But http://mywebstore.com/customer/account/login/goes to https://mywebstore.com/customer/account/login/ witch is a 'Not possible to access this webpage' page.