receive parameter ask physique wcf/ado.net information service

i'm tryint post ado.net information use nonetheless parameters seems misplaced along way.

i got something like:

[webinvoke(method="post")]
public int mymethod(int foo, twine bar) {...}

and i an ajax-call controlling prototype.js as:

var args = {foo: 4, bar: "'test'"};
new ajax.requst(baseurl + 'mymethod',
  method: 'post',
  parameters: args,
  onsuccess: jadda,
  onfailure: jidda
}

if i reinstate "method: 'post'" "method: 'get'" "webinvoke(method="post")" "webget" all works nonetheless (using post) i is:

bad ask - blunder query syntax.

from service.

the wholly repair (that i don't wish use) send parameters url even i perform post. any ideas welcome.