Hi, I`m trying to install TSSE v4.3 but I get an error on step 4, the browser is trying to inset the tables to db but then ERROR :( , below is the error:

you have some security module enabled on apache? (mod_security)
or other similar modules....
disable, install then enable again. but you'll have problem also at admin panel....

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If i change my host, then this mod_security will "dissapear", the most of the hostings don`t have this module enabled, right? I`ll try to change my host and see if it will work :)

Don't change the host... first check if it's really enabled by checking the php info. (i only presume it is enabled)
Also check the error logs...
And if i remeber right, this can be disabled from .htaccess
Check the following links for further info:
Remove and Uninstall or Disable ModSecurity (mod_security) My Digital Life

How to disable mod_security in .htaccess file

Disabling mod_security

mod_security Guide and Examples of use in .htaccess

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