Error in ESS Travel Request iView

Dear All,

I am new to HR module of SAP. I have tried to access the ESS iveiw provided by the SAP in the portal. when i access the iveiws (webdynpro/Java) it gives error. can any one tell me how to resolve this error?

Also when i go through the sap help portal, i read that from ECC 6.0 package 2 they are going to support only ABAP/webdynpro and not JAVA/webdynpro (ESS). Is it correct?

when i try to query the flight availability through standard SAP travel managment, my system gives error as "Connection error with external reservation system". what could be the cause for this error? can any one help to get rid of this error?

with Regards,

Balachander