Magento Connect Manager下载器500内部服务器错误

我有一个Magento 1.7全新安装，我刚刚完成产品上传.我去了系统> Magento Connect> Magento Connect Manager，我被重定向到:

I have a Magento 1.7 clean install and I just finished uploading my products. I went to to go to System > Magento Connect > Magento Connect Manager and I'm redirected to:

出现500个内部服务器错误.我检查了Apache错误日志，关于此的任何内容均未发布.我也禁用了htaccess，也没有任何效果.像所有其他文件一样，该权限已设置为apache用户(守护程序)，而我将Magento中所有内容的权限都设置为777.不知道该怎么办！

With a 500 Internal Server Error. I checked the Apache Error log and nothing is being posted about this. I also disabled the htaccess and that had no effect either. The permissions are set to the apache user (daemon) like all the rest of the files and I set the permissions to everything in Magento to 777. Not sure what else to do!!

有人帮忙吗?