I was able to get the ajax call to send successfully.  However, when I step through the AjaxWrapper() code, I get an error.  It turns out that Request.Params["FUNCTION"] is null.  I double checked the spelling, and it's not merely me misspelling "function".  When I referenced Request.Params[1] while in the debugger, I did see the data the ajax call sent over:

"{'FUNCTION': 'FunctionName', 'param0': '1' }"   
 

Is there something else I'm missing?

 Sorry for the slow reply - I misread part of one of your posts. Which made the problem unclear to me.

Looking over it again - You have quotations around the data field
data: "({'FUNCTION': 'TestBooyah', 'param0': '1' })",
it should be
data: ({'FUNCTION': 'TestBooyah', 'param0': '1' }),

 One last question:  when you successfully get the result from the ajax call, how do you access the string?  I'm talking about this part of the ajax call:

success: function(result) {

},

I've tried to access the result by doing result[0] or result.d, but nothing seems to work.  I always get undefined.  If I just do an result), I'll get "[object, Object]".