Getting Status 500 - Internal Server error when accessing https://secure.au1.echosign.com

Hi there,

I am trying to access https://secure.au1.echosign.com URL (Adobe Sign - Echosign) while generating the Access Token from my C# application.

For some reason it just keeps giving me the "Status 500 - Internal Server error". Doesn't say much to help.

When I type the above URL with the other parameters (response_type, client_id" etc.) in the browser, it works just fine and I am also able to generate the "code".

Can someone help?

Please help - do reply if any information is needed.

Thanks!