Cannot modify header information

Hallo,
bekomme nach einer Neuinstallation folgende Fehlermeldung:

[COLOR=#000000]Warning: Cannot modify header information - headers already sent by (output started at /homepages/45/d69446399/htdocs/mark/wp-config.php:1) in/homepages/45/d69446399/htdocs/mark/wp-login.php on line 267[/COLOR]

[COLOR=#000000]Warning: Cannot modify header information - headers already sent by (output started at /homepages/45/d69446399/htdocs/mark/wp-config.php:1) in/homepages/45/d69446399/htdocs/mark/wp-login.php on line 279[/COLOR]

[COLOR=#000000]Warning: Cannot modify header information - headers already sent by (output started at /homepages/45/d69446399/htdocs/mark/wp-config.php:1) in/homepages/45/d69446399/htdocs/mark/wp-includes/pluggable.php on line 595[/COLOR]

[COLOR=#000000]Warning: Cannot modify header information - headers already sent by (output started at /homepages/45/d69446399/htdocs/mark/wp-config.php:1) in/homepages/45/d69446399/htdocs/mark/wp-includes/pluggable.php on line 596[/COLOR]

[COLOR=#000000]Warning: Cannot modify header information - headers already sent by (output started at /homepages/45/d69446399/htdocs/mark/wp-config.php:1) in/homepages/45/d69446399/htdocs/mark/wp-includes/pluggable.php on line 597[/COLOR]

[COLOR=#000000]Warning: Cannot modify header information - headers already sent by (output started at /homepages/45/d69446399/htdocs/mark/wp-config.php:1) in/homepages/45/d69446399/htdocs/mark/wp-includes/pluggable.php on line 770[/COLOR]

[COLOR=#000000]wer kann mir hier weiterhelfen?[/COLOR]
[COLOR=#000000]besten Dank[/COLOR]
[COLOR=#000000]mslucky[/COLOR]

Danke,

der Fehler ist behoben. Beim nächstenmal sehe ich gleich in der Dokumentation nach.

Nochmals danke
MSLucky