The test form is only available for methods with primitive types as parameters

While devoloping a web service
easiest way to testing it with running in visual studio
and description screen for web service will be opened..
but complex types It is unable to use..
just only if bool ,string,int simple types are used,testing can be done

any other trick is remote testing(by defualt security reasons remote testing is closed)(testing form any other machine that service devoloping)
open protocels for that..under web.config's sysstem.web node