FLTK bug

Now i'm trying "HarmonicAdditiveSynthesis2.csd" written by Iain McCurdy, 2006, with the "FLTK" interface. It's not work, i has even WinTclTk installed before theCSound 5.08 installation...
all that - under WInXP SP3...

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Csound 5.07 !!!

"Csound version 5.08 seems to have some issues with the integration of FLTK. Program exiting is a little messy under 5.08 and Steven Yi's virtual keyboard doesn't seems to work. I would recommend sticking with 5.07 for the time being."
(http://iainmccurdy.org/csound.html)