Erro qdo instalo um tema Warning: session_start() [function.session-st

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Olá Pessoal

A empresa onde trabalho comprou um tamplate para wordpress mas não consigui fazer funcionar no servidor.

Rodando na minha máquina local funciona sem problemas, mas qdo instalo no servidor dá o seguinte erro:

 

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at D:\Web\site_connexion\wp-content\themes\theme1119\functions.php:702) in D:\Web\site_connexion\wp-content\plugins\si-contact-form\si-contact-form.php on line 940

 

 

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at D:\Web\site_connexion\wp-content\themes\theme1119\functions.php:702) in D:\Web\site_connexion\wp-content\plugins\si-contact-form\si-contact-form.php on line 940

 

e quando tento acessar o wp-admin aparece os seguintes erros:

 

Warning: session_start() [function.session-start]: Cannot send session cookie - headers already sent by (output started at D:\Web\site_connexion\wp-content\themes\theme1119\functions.php:702) in D:\Web\site_connexion\wp-content\plugins\si-contact-form\si-contact-form.php on line 940

 

Warning: session_start() [function.session-start]: Cannot send session cache limiter - headers already sent (output started at D:\Web\site_connexion\wp-content\themes\theme1119\functions.php:702) in D:\Web\site_connexion\wp-content\plugins\si-contact-form\si-contact-form.php on line 940

 

Warning: Cannot modify header information - headers already sent by (output started at D:\Web\site_connexion\wp-content\themes\theme1119\functions.php:702) in D:\Web\site_connexion\wp-includes\pluggable.php on line 886

 

Se alguém poder me ajudar o endereço temporario do site é esse:

http://extranet.connexion.com.br/siteconnexion

 

Não sei o que acontece lá no servidor pois em minha máquina (win xp) consegui fazer funcionar normalmente, me ajudem por favor..

[Anderson Narciso 3]

Desativa ou deleta esse plugin si-contact-form

\plugins\si-contact-form\si-contact-form.php on line 940

depois testa..

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beleza eu desativei o plugin do contact e o front-end do site abriu normalnente, mas não consigo acessar o wp-admin

dá esse erro:

Warning: Cannot modify header information - headers already sent by (output started at D:\Web\site_connexion\wp-content\themes\theme1119\functions.php:702) in D:\Web\site_connexion\wp-includes\pluggable.php on line 886

 

E se eu chamo a página de login wp-login.php aparece esses erros:

Warning: Cannot modify header information - headers already sent by (output started at D:\Web\site_connexion\wp-content\themes\theme1119\functions.php:702) in D:\Web\site_connexion\wp-login.php on line 337

 

Warning: Cannot modify header information - headers already sent by (output started at D:\Web\site_connexion\wp-content\themes\theme1119\functions.php:702) in D:\Web\site_connexion\wp-login.php on line 349

Pal Consult Co.

 

O que será que está causando esse erro, pois até agora eu não consegui entender o motivo do erro.