I am using the following api url to try to retrieve the teams for the currently authenticated user:

http://fantasysports.yahooapis.com/fantasy...e_login=1/teams

but am always getting the following response:

CODE

<?xml version="1.0" encoding="UTF-8"?>
-<error xml:lang="en-us" xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" xmlns="http://www.yahooapis.com/v1/base.rng" yahoo:uri="http://fantasysports.yahooapis.com/fantasy/v2/users;use_login=1/teams?oauth_details=removed>
<description>Server Error</description>
<detail/>
</error>

i am confident my oauth parameters are all correct because i am generating them using a shared class that is working fine when i use the following api urls:

http://fantasysports.yahooapis.com/fantasy...?is_available=1
http://fantasysports.yahooapis.com/fantasy...ers;use_login=1

i'm just getting started with the api, so any help is greatly appreciated.

TIA