Issue with the Zoho Project API

I am issuing a Get all Activities request at the URL http://projects.zoho.com/portal/{myporta}/api/private/xml/dashb?[mydata]

and receiving an error code 6501 - 'inpurt parameter doesn't match'

The parameters I am sending are:

"projId": [valid id],

"auditIndex": "",

"range": "",

"username": "all"

Is there a reason this is wrong?

Additionally, the get milestone request fails for requests where flag = 'allflag' but works for 'external' and internal.

Can this be fixed? Am I doing something wrong?