After install next day can't access admin page

[Abomni]

installed fresh copy, new DB, all by instructions provided with installation pack. After installation made all renames etc. And was everything working till next day. Shop page works and seems to be same as i left but i can't access admin page (link is correct for sure).
FF just stays blank, chrome gives me second:
The website encountered an error while retrieving http://www.fm-group.net46.net/xxxxxxx/. It may be down for maintenance or configured incorrectly.
Here are some suggestions:
Reload this webpage later.
HTTP Error 500 (Internal Server Error): An unexpected condition was encountered while the server was attempting to fulfill the request.
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hosting - 000webhost
installed - Lithuanian language 002

probably answer lays in hosting company? During install as i remember .htaccess is not supported.

[RescoCCC]

Do you have an .htaccess file in the root, or in your admin directory? If so, what happens if you rename them?

[Abomni]

There's no .htaccess in root.
In admin directory changed name of .htaccess and no effect, then deleted and the same.

[Abomni]

ok i figured out that language pack is a problem, seems will have to make own translation.