Flux CP using Fluxbb problem

[thanna 11]

I tried to install Fluxbb on my FluxCP I follow sir jupeto's instruction carefully and I installed on my fluxcp using the fluxbb installation wizard but when I click on Fluxbb on the menu it shows this error, can someone help me on my problem thanks in advance

 

 

this is the error that shows up when I go on my fluxBB

 

 

 

Warning: Cannot modify header information - headers already sent by (output started at C:xampphtdocsflux3themesdefaultheader.php:7) in C:xampphtdocsflux3addonsfluxbbthemesdefaultfluxbbindex.php on line 7Notice: Undefined variable: pun_user in C:xampphtdocsflux3addonsfluxbbthemesdefaultfluxbbindex.php on line 10Notice: Undefined variable: pun_user in C:xampphtdocsflux3addonsfluxbbthemesdefaultfluxbbindex.php on line 15Warning: require(fluxbb/lang//index.php) [function.require]: failed to open stream: No such file or directory in C:xampphtdocsflux3addonsfluxbbthemesdefaultfluxbbindex.php on line 15Fatal error: require() [function.require]: Failed opening required 'fluxbb/lang//index.php' (include_path='lib;.;C:xamppphpPEAR') in C:xampphtdocsflux3addonsfluxbbthemesdefaultfluxbbindex.php on line 15