Kann mein forum nicht installieren

Hallo ich habe hier ein Problem und zwar kann ich meine foren Software nicht installieren

immer wen ich auf diesen link hier klicke rgs-elite.bplaced.net
kommt folgende Fehlermeldung

Fatal error: PHP error in file /users/_temp/rgs-elite/a9bc3d1b_TemplatePluginPrefilterLang.class.php (30): preg_replace() [function.preg-replace]: The /e modifier is deprecated, use preg_replace_callback instead

Information:

error message: PHP error in file /users/_temp/rgs-elite/a9bc3d1b_TemplatePluginPrefilterLang.class.php (30): preg_replace() [function.preg-replace]: The /e modifier is deprecated, use preg_replace_callback instead
error code: 0
file: /users/rgs-elite/www/install.php (205)
php version: 5.5.5
wcf version: 1.1.9 (Tempest)
date: Thu, 16 Jan 2014 20:39:01 +0000
request: /install.php
referer:

Stacktrace:
#0 [internal function]: handleError(8192, ‘preg_replace() …’, ‘/users/_temp/rg…’, 30, Array)
#1 /users/_temp/rgs-elite/a9bc3d1b_TemplatePluginPrefilterLang.class.php(30): preg_replace(’~{lang}([\w…’, ‘WCF::getLanguag…’, ‘{$setupPackageN…’)
#2 /users/_temp/rgs-elite/a9bc3d1b_TemplateScriptingCompiler.class.php(1298): TemplatePluginPrefilterLang->execute(’{$setupPackageN…’, Object(TemplateScriptingCompiler))
#3 /users/_temp/rgs-elite/a9bc3d1b_TemplateScriptingCompiler.class.php(87): TemplateScriptingCompiler->applyPrefilters(’{$setupPackageN…’)
#4 /users/_temp/rgs-elite/a9bc3d1b_SetupLanguage.class.php(80): TemplateScriptingCompiler->compileString(‘wcf.global.page…’, ‘{$setupPackageN…’)
#5 /users/_temp/rgs-elite/a9bc3d1b_WCFSetup.class.php(59): SetupLanguage->loadLanguage()
#6 /users/rgs-elite/www/install.php(750): WCFSetup->__construct()
#7 {main}