get_persistent_connection_table throws Soap exception

Has anyone tried to use the get_persistent_connection_table method on a 4.5.11 controller and acutally been able to parse the SOAP coming back?

Ive tried the following in Perl and .Net and still get a soap exception trying to parse the returned data. Specifically i get "Unexpected end of file while parsing Name has occurred".

Any help would be great

thanks

neil

public void get_sticky()
{    
try
    {
LocalLBPool.get_sticky_mask(sPoolName);
Console.WriteLine("Get Sticky mask worked");
ITCMLocalLBPoolPersistentConnection [] stickyStats = LocalLBPool.get_persistent_connection_table(0);
for (int i = 0; i < stickyStats.Length; i++)
{
    Console.Write(stickyStats.member_node + " has been alive " + stickyStats.alive_time );
}
    }
catch (System.Net.WebException webEx)
    {
printException(webEx);
    }
}