C4C mashup BO URL opening in new window

Hi, Experts,

We have a requirement to show BO Report(Webi report) on C4C account overview page as URL mashup.

But when we opening the account,  report is completely overriding the C4C screen and opening BO logon screen.

this issue is happening when the BO is 4.0. and not happening for BO 4.1.

I believe if we can pass the credentials via URL(if URL has the parameters) issue will not happen. Unfortunately we can't pass credentials as BO 4.0 doesn't have the option