ok im trying to build a box in wed as big as i can get,, and well after scaleing it with mouse by selecting the colored arrows, it disappears from the screen whats with that?? box too big for the world to handle ? or am i just missing something,, i zoom outwards as much as i can get cause i want a huge area, but it doesnt seem to be working,,,, any and all help is appreciated, thanks in advance.

What is your computer setup? I had the same problem when I tried to make levels on my convertible tablet. Integrated graphics don't do well with 3d. Its not just gamestudio I can't use ultimate unwrap either. I can do bryce renders though which is odd.
So.. if this is your problem the only thing you can do is kill any resource hogs on your system, usually the antivirus.
sometimes zooming in and out can make the box reappear, sometimes selecting the block from the side bar works. The box isn't gone, it just isn't visible on your screen. build the level and it will be there.
I don't think I have ever had this problem on a PC with a discrete card.

i got an AMD turion tl-52 dual core 64 bit processor, 1 gig ram, nvidia go 6150(cough),,, windows xp media ,,, everytime i build windows error pops up , and of course i send, i however dotn have a level leak or nothing, which makes me wonder if its my os,,,,