The Autodiscover service couldn't be located with EWS Java API 1.1

i am using EWS Java API 1.1 to access exchange 2010 account as follows:

                        ExchangeService service = new ExchangeService();    			ExchangeCredentials credentials = new WebCredentials(email,    					password);    			service.setCredentials(credentials);    			service.autodiscoverUrl("adamb@fabrikam.com");    			Folder inbox = Folder.bind(service, WellKnownFolderName.Inbox);    			System.out.println("messages: " + inbox.getTotalCount());

but i am getting the following exception:

    08/10/2012 05:11:35 م org.apache.commons.httpclient.HttpMethodDirector executeWithRetry    INFO: I/O exception (java.net.ConnectException) caught when processing request: Connection timed out: connect    08/10/2012 05:11:35 م org.apache.commons.httpclient.HttpMethodDirector executeWithRetry    INFO: Retrying request    08/10/2012 05:11:56 م org.apache.commons.httpclient.HttpMethodDirector executeWithRetry    INFO: I/O exception (java.net.ConnectException) caught when processing request: Connection timed out: connect    08/10/2012 05:11:56 م org.apache.commons.httpclient.HttpMethodDirector executeWithRetry    INFO: Retrying request    08/10/2012 05:12:17 م org.apache.commons.httpclient.HttpMethodDirector executeWithRetry    INFO: I/O exception (java.net.ConnectException) caught when processing request: Connection timed out: connect    08/10/2012 05:12:17 م org.apache.commons.httpclient.HttpMethodDirector executeWithRetry    INFO: Retrying request    microsoft.exchange.webservices.data.AutodiscoverLocalException: The Autodiscover service couldn't be located.    	at microsoft.exchange.webservices.data.AutodiscoverService.internalGetLegacyUserSettings(Unknown Source)    	at microsoft.exchange.webservices.data.AutodiscoverService.getLegacyUserSettings(Unknown Source)    	at microsoft.exchange.webservices.data.AutodiscoverService.internalGetLegacyUserSettings(Unknown Source)    	at microsoft.exchange.webservices.data.AutodiscoverService.getUserSettings(Unknown Source)    	at microsoft.exchange.webservices.data.ExchangeService.getAutodiscoverUrl(Unknown Source)    	at microsoft.exchange.webservices.data.ExchangeService.autodiscoverUrl(Unknown Source)    	at microsoft.exchange.webservices.data.ExchangeService.autodiscoverUrl(Unknown Source)    	at main.java.TestMail.main(TestMail.java:22)

please advise how to fix that.