Hello, 

When i'm trying to create a task with the API it gives me the following error:

UNKNOWN_EXCEPTION: Destination URL not reset. The URL returned from login must be set in the SforceService

Can someone help me?

I'm trying to convert a lead to a account with the partner.wsdl API as shown in the link below:
https://developer.salesforce.com/page/PHP_Toolkit_20.0_ConvertLead_Sample_(Partner)

However all except ID return NULL so it won't convert.
http://puu.sh/gw7Jh/664567d6cd.png

I want to store information into the note section of a lead, so how do i do that? I'm using the Enterprise WSDL.