Internal Server 500 error

[Rick Fox]

My company is just getting started trying to use this API. When we
post for our authentication, we are getting back
"The remote server returned an error: (500) Internal Server Error."
Nothing else. Last Post made at #6/17/2011 11:42:54 AM#

Can you look at the error and see if there is any information that
could help.

We are developing this in vb.net. If you have any working code
examples you could provide, that would be helpful as well.

[Rick Fox]

Okay, so I pulled out the Post and put into the Firefox add-on Poster,
to have a straight forward Post. I am now getting the "(500) Internal
Server Error." & <?xml version="1.0" encoding="UTF-8"?>
<errors>
<error>API Key is required</error>
</errors>


I am including the key... see below
<?xml version="1.0" encoding="UTF-8"?>
<request>
<user>
<email>tasks@#########.com</email>
<password>##############</password>
</user>
<api-key>##########################</api-key>
</request>