Error fetching feed: Wrong mime-type. Need application/xml, text/csv, or variant

Hi, I have been able to get this to work in the past and now its not working.

I get this error message when I try to verify the feed

"Error fetching feed:

Wrong mime-type. Need application/xml, text/csv, or variants."

I have change the first line on the php file from text/xml to application/xml but I am still having the same problem

<?php header("content-type: application/xml; charset=utf-8"); ?>
<?php
	$contents = file_get_contents("http://the_url");...

DATA: (modified from http://the_url")
<eeml xmlns='http://www.eeml.org/xsd/005' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xsi:schemaLocation='http://www.eeml.org/xsd/005 http://www.eeml.org/xsd/005/005.xsd'> 
	<environment> 
		<data id='0'> 
			<tag>Temperature</tag> 
			<value minValue='-20' maxValue='40'>1</value> 
			<unit symbol='C' type='derivedSI'>Celsius</unit> 
		</data> 
		<data id='1'> 
			<tag>Wind Speed</tag> 
			<value minValue='0' maxValue='100'>3</value> 
			<unit symbol='mph' type='derivedSI'>MPH</unit> 
		</data> 
		<data id='2'> 
			<tag>Humidity</tag> 
			<value minValue='0' maxValue='100'>82</value> 
			<unit symbol='%' type='derivedSI'>%</unit> 
		</data> 
		<data id='3'> 
			<tag>Pressure</tag> 
			<value minValue='0' maxValue='2000'></value> 
			<unit symbol='mB' type='derivedSI'>mB</unit> 
		</data> 
		<data id='4'> 
			<tag>Wind Direction</tag> 
			<value minValue='0' maxValue='360'>0</value> 
			<unit symbol='' type='derivedSI'></unit> 
		</data> 
	</environment> 
</eeml>