[Koha] Installing koha on Ubuntu machine

[Khurram]

After installing KOHA when i tried to access admin via browser
http://127.0.1.1:8080/, gives me following error :

:::::::::Browser Screen:::::::::::::::
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Software error:

Access denied for user 'kohaadmin'@'localhost' (using password: YES) at
/usr/share/koha/lib/C4/Context.pm line 730.
Compilation failed in require at /usr/share/koha/lib/C4/Auth.pm line 33.
BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Auth.pm line 33.
Compilation failed in require at /usr/share/koha/intranet/cgi-bin/
mainpage.pl line 25.
BEGIN failed--compilation aborted at /usr/share/koha/intranet/cgi-bin/
mainpage.pl line 25.

For help, please send mail to the webmaster (webmaster at riphah-desktop),
giving this error message and the time and date of the error.
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And http://127.0.0.1/ Works!

Any solution, need help.