Hm.. that's very odd. It SHOULD open in a fruity wrapper. Did you try increasing your resolution to 1024x768? FL had problems with lower resolutions. Also, how are you adding the plugin? You should make a Fruity Wrapper channel, then find the plugin on the list, generally.
I also have a rather basic question for FL users here: is the order in which you load effects in a mixer channel the order in which the effects are processed? Or is there a preset order (ie. all EQs come before all compressors which come before all reverbs)?
Hm. Thanks, I'll try that.