installation errors

[egyptnile]

Hello
I had those set of errors while installing the extension
I use Joomla 3.3
::::::

Warning: Cannot modify header information - headers already sent by (output started at /****/plugins/system/jumirouter/jumirouter.php:20) in /****/plugins/system/jsnpoweradmin/jsnpoweradmin.php on line 435

Warning: Cannot modify header information - headers already sent by (output started at /****/plugins/system/jumirouter/jumirouter.php:20) in /****/plugins/system/jsnpoweradmin/jsnpoweradmin.php on line 436

Warning: Cannot modify header information - headers already sent by (output started at /****/plugins/system/jumirouter/jumirouter.php:20) in /****/plugins/system/jsnpoweradmin/jsnpoweradmin.php on line 437

Warning: Cannot modify header information - headers already sent by (output started at /****/plugins/system/jumirouter/jumirouter.php:20) in /****/plugins/system/jsnpoweradmin/jsnpoweradmin.php on line 438

Warning: Cannot modify header information - headers already sent by (output started at /****/plugins/system/jumirouter/jumirouter.php:20) in /****/plugins/system/jsnpoweradmin/jsnpoweradmin.php on line 439

Warning: Cannot modify header information - headers already sent by (output started at /****/plugins/system/jumirouter/jumirouter.php:20) in /****/administrator/components/com_poweradmin/helpers/history.php on line 238

Warning: Cannot modify header information - headers already sent by (output started at /****/plugins/system/jumirouter/jumirouter.php:20) in /****/administrator/components/com_poweradmin/helpers/history.php on line 239

Warning: Cannot modify header information - headers already sent by (output started at /****/plugins/system/jumirouter/jumirouter.php:20) in /****/administrator/components/com_poweradmin/helpers/history.php on line 240

Warning: Cannot modify header information - headers already sent by (output started at /****/plugins/system/jumirouter/jumirouter.php:20) in /****/administrator/components/com_poweradmin/helpers/history.php on line 241

Strict Standards: Only variables should be assigned by reference in /****/plugins/system/jumi/jumi.php on line 25

Best regards

[egyptnile]

I had to un-install it because it causes crash to other admin components

[egyptnile]

no reply? no advice?