Cannot open drawings through the sheet set manager in 2K5

[okillham]

i've just upgraded to 2K5, and created a sheet set for a project I just began. I am unable to open the drawings up by double clicking them in sheet set manager like I am supposed to be able to. I tried going through the new features tutorial and have the same problem in there. I haven't been able to find any help on this issue anyplace on the internet either.
any help would be appreciated, feel free to email me personally.

[RobertB]

Are you able to right-click and open?

[okillham]

i figured out that it was because i was in sdi mode and not mdi mode. it worked fine in map, but not land desktop. do you know how to switch modes?

[RobertB]

LDD only supports SDI, sorry.