Error with tsbutton

[Silvio]

I have aproblem with tsbutton
the button I create with tsbutton ( noboxtr) not is trasparent in a window where I use a bitmap on background...

I made also a small test program ...to try it !!

the test.prg is at :http://hyperupload.com/download/024ac3fe50/TESTSB.zip.html

Thanks in advance

Best Regards