feed problem in firefox and google

[mohard]

i have problem when creating feed. it's can be read by feedreader, and also shown in firefox but failed in google.this is my feed header:\[code\]<?xml version="1.0" encoding="utf-8"?><rss version="2.0"><channel><title>Myfeed</title><link>http://www.myfeed.com/</link><description>This is myfeedFeed</description><lastBuildDate>Mon, 12 agust 2105 11:17:00 GMT</lastBuildDate><language>en-us</language>\[/code\]This is my feed outut with 2 items\[code\] <?xml version="1.0" encoding="UTF-8"?><rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/" xmlns:wfw="http://wellformedweb.org/CommentAPI/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:atom="http://www.w3.org/2005/Atom" xmlns:sy="http://purl.org/rss/1.0/modules/syndication/" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" ><channel><title>myfeed Feed</title><atom:link href="http://www.localhost.com/" rel="self" type="application/rss+xml" /><link>http://www.localhost.com/</link><description>This is myfeed Feed</description><lastBuildDate>Mon, 12 Sep 2015 18:37:00 GMT</lastBuildDate><language>en-us</language><sy:updatePeriod>weekly</sy:updatePeriod><sy:updateFrequency>1</sy:updateFrequency><title>Hello Developer</title><link>http://localhost.com/</link><guid>http://localhost.com/</guid><pubDate>20100907</pubDate><dc:creator>myfeed</dc:creator><category><![CDATA[Developer]]></category><category><![CDATA[Tutorial]]></category><category><![CDATA[Wordpress]]></category><description><![CDATA[Hello developer license]]></description><license>Developer</license><quantity>1</quantity><filename>http://localhost.com/wp-content/uploads/downloads/2010/05/that.zip</filename><file_description>Hello developer license</file_description><diversion>1.1</diversion><hits>0</hits><user>myfeed</user><members>1</members><mirrors>1</mirrors></item><item><title>Hello Developer 2</title><link>http://localhost.com/</link><guid>http://localhost.com/</guid><pubDate>20100907</pubDate><dc:creator>myfeed</dc:creator><category><![CDATA[Developer]]></category><category><![CDATA[Tutorial]]></category><category><![CDATA[Wordpress]]></category><description><![CDATA[Hello developer license]]></description><license>Developer</license><quantity>1</quantity> <filename>http://localhost.com/wp-content/uploads/downloads/2010/06/this.zip</filename><file_description>Hello developer license</file_description><diversion>1.1</diversion><hits>0</hits><user>myfeed</user><members>1</members><mirrors>1</mirrors></item></channel></rss>\[/code\]