StartProjectWithVariables - Server was unable to process request. ---> Object reference not set to an instance of an object

 I'm trying to build a small web site that uses the FB web services to do a few tasks on our build servers. So far it has been able to list projects and even get prompt values and display basic information.

Now i'm at the point i want to gather user input and start projects but its failing... I've tried serveral different projects with different prompt types and every one of them fails with... 

Server was unable to process request. ---> Object reference not set to an instance of an object.

I can't seem to find ANY examples of using this method... can someone please show me the light?? 

 RTFM error on my part..

"Start Project With Variables

Adds the project to the build queue with the variable values specified. Variables to be specified in format 'VariableName=VariableValue'

 

Parameters:

Authentication Token - string

Project Name - string

Variables - array of String"

 

I wasn't setting the array of variables correctly.. now that i added the variable name= in fornt of each value it works!