maintain master data issue after upgrade to HEC

Hi,

after upgrading from BI 7.3 to BI 7.4 HEC environment, we are having an issue with maintain master data in RSD1 transaction.

following are the steps.

type in 0ACCOUNT in transaction RSD1

go to display --> maintain master data (in BI 7.3, next screen stays in SAP GUI screen)

but after upgrade, it is going to web page with a message "this page can't be displayed" that has HEC.SAP in the webaddress and other info.

looks like, there must be some setting where we need to enter correct URL that is functional.

also, does some one know how we stay with in SAP GUI for maintaining master data instead of going to web page?

thanks!!!