Since 11.x it is mandatory to have the same version of web client to access the workspace so you need 184.108.40.206 webclient to access 220.127.116.11 workspace.
Now I think you could try using multiple browser (like Firefox and IE) so you could install 8.x plugin with FF and 18.104.22.168 with IE.
Hope this helps.
Thanks for your reply.
I have checked with Firefox, Firefox is not supported for Interactive Reporting and am not able to use the bqy files through the workspace of Firefox.
Please suggest us for any alternate solution.