I am quite lost as to what it is that you did. Did you install mojoPortal into two different IIS websites and rigg both installations to use one database?
Running multiple installations with 1 database definitely isn't supported. If this is what you did, it would be a crap shoot to figure out why it isn't working correctly.
Running multiple sites inside one installation is supported and actually quite easy to do. Is this what you were trying to do but it didn't work out for you?
I hope I can help further after understanding what it is you did and what it is you are trying to accomplish.