http 500 error returned atfter post

What steps will reproduce the problem?
1.when I post request content to URL below,server will returned http 500 error
2.But i can get right response when posting the other content to the same URL
3.And i also can get the right response when posting the same request content 
to the same URL on windows.

What is the expected output? What do you see instead?
I wanna to know why that happened?

What version of the product are you using? On what operating system?
firefox21.0 & poster3.2.0 on MAC OS X10.6.8

Please provide any additional information below.

my request content:
<MioMoreUpdate >
<request>
<param name="type" value="MioMoreDeviceApplyMapUpdate"/>
<param name="Retry" value="true"/>
<param name="regionid" value="130354411"/>
<param name="version" value="13.0354"/>
<param name="model" value="TATA3_TS5026"/>
<param name="sku" value="1913"/>
<param name="UUID" value="00022AC1FC92000813C41BF87808B710"/>
<param name="enabler1" len="1" value="d71a744f3eb3e1c3"/>
<param name="mapcore" value="52"/>
<param name="language" value="en-NZ"/>
<param name="timeStamp" value="13:37:12 04/01/2009"/>
</request>      
</MioMoreUpdate>

URL:http://10.60.1.1:80/ContentPortal/MiomoreMapUpdate.action

Original issue reported on code.google.com by holly.de...@gmail.com on 6 Jun 2013 at 10:01

jingmaofeng / poster-extension

http 500 error returned atfter post #106