I'm trying to reinstall. But when I call installer.pl from the browser, I get the following error in the logs:

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installer.pl: DBI connect('database=;host=localhost;','root',...) failed: Access denied for user 'root'@'localhost'
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The browser kicks back this error:

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Message: Can't connect to database, read comment!

Traceback (2916): 
   Module: Kernel::Output::HTML::Layout::Error (v1.176.2.17) Line: 1416
   Module: Kernel::Output::HTML::Layout::ErrorScreen (v1.176.2.17) Line: 1395
   Module: Kernel::Modules::Installer::Run (v1.58) Line: 221
   Module: main::GenericModules (v1.31) Line: 130
   Module: /opt/otrs/bin/cgi-bin/installer.pl (v1.31) Line: 91

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Any ideas? I'm hoping to reinstall, since I lost my front end while modifying .dtl files.