i get an error "app not found" at permissions on admin panel

admin.php

line 130
'<br />'.url('adminpermissions',t('User Permissions')).'</div>

should be:
'<br />'.url('admin/permissions',t('User Permissions')).'</div>

simular errors at line 106 (admin/modules) and line 110 (admin/menu)

i have been trying to give some administrative permission to the user but it shows

app not found

and i have tried changing the admin.php..it doesnt work for me atleast.. help please

same problem here.. line 130 is blank actually