I have a (rather simple) app that is made with the 1.6 version of the javascript api and 9.3.0 version of ArcGIS Server. It uses the identifyTask. When I change the version number to 2.0, the identifyTask.execute doesn't work anymore. The first error was "xhr is null or not an object". I could solve this by configuring the proxy page (which was not needed in v1.6) but still it won't work; error is somthing like "typeerror system error -2146697211". Any clues ?