[rt-users] combine 'and' 'or' in queries - cant do it?

[TeleMole]

HI all,,

I am trying to build a saved search that will show me all tickets that
are over 48 hours old with either no response or update.

So i need to see tickets that are 'new' OR 'open' AND
created/lastupdates < -48 hours - every time i try to create it - it
only allows me to switch all the or's to and's or vice versa....

why is this? Should i not be able to cerate the query above? Am I
missing something obvious? thanks in advance!

Sean Daniels