Problems with BxDolPageViewAdmin.php

HELP ME PLEASE! I CANT LOGIN IN MY DOLPHIN. AFTER I CHANGE THIS FILE: BxDolPageViewAdmin.php

SEE THE ERROR: 

Warning: Cannot modify header information - headers already sent by (output started at 

/home/esom/public_html/dolphin/inc/classes/BxDolPageViewAdmin.php:1845) in 

/home/esom/public_html/dolphin/inc/design.inc.php on line 133

Warning: Cannot modify header information - headers already sent by (output started at 

/home/esom/public_html/dolphin/inc/classes/BxDolPageViewAdmin.php:1845) in 

/home/esom/public_html/dolphin/inc/design.inc.php on line 147

Warning: Cannot modify header information - headers already sent by (output started at 

/home/esom/public_html/dolphin/inc/classes/BxDolPageViewAdmin.php:1845) in 

/home/esom/public_html/dolphin/inc/design.inc.php on line 148

Warning: Cannot modify header information - headers already sent by (output started at 

/home/esom/public_html/dolphin/inc/classes/BxDolPageViewAdmin.php:1845) in 

/home/esom/public_html/dolphin/inc/design.inc.php on line 149

Warning: Cannot modify header information - headers already sent by (output started at 

/home/esom/public_html/dolphin/inc/classes/BxDolPageViewAdmin.php:1845) in 

/home/esom/public_html/dolphin/inc/design.inc.php on line 150

Warning: Cannot modify header information - headers already sent by (output started at 

/home/esom/public_html/dolphin/inc/classes/BxDolPageViewAdmin.php:1845) in 

/home/esom/public_html/dolphin/inc/classes/BxDolSession.php on line 64

Change was either done incorrectly or your editor added white space to the end of the file.

Edit PHP files in a standard text editor ONLY. Like notepad or editplus.

Make sure the file contains nothing at the end after the closing ?> php tag. No spaces, no blank lines after the closing tag.

Thanks Deano. It´s work perfect now!