Before putting custom/downloaded objects into your maps, you need to save them into their own groups other than the default objects. Here's a small tutorial if you're better with a visual: http://feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=8096.msg114419 (http://feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=8096.msg114419)
This usually happens when you save them in an old object group, including the default groups. Try saving them all in a new object group. You can delete the old objects after placing the new ones in the map with the old ones.
hey thanks so much it worked I just have to replace all the old cubes and stuff with the new ones if you like when I am done I can give you the link to the map so you can download it just for you, for helping me out
Ooo, I can't wait to see the finished map! You could upload your map and post the download here, with screenshots, of course! Good luck finishing your map! Finished Maps Section (http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&board=110.0)