Also, if you've loaded the "plugin" macro to export directly to CorelDRAW (10-X3, I think), you can run that macro and not need to worry about extensions.
Any placed images (bitmaps) will just show up as rectangles, tho, so they'll need to be imported seperately.
Otherwise you need to save it as an AI or EPS...I'm not sure which version, but I've used version 8 just to be sure.