I posted the problem in another forum. this is the answer:
" Hi There,
The BlackBerry simulator does not show up in the Tools --> Device Emulator Manager. That section is only for Windows Mobile devices.
All Simulators for BlackBerry development are in the Tools --> Options --> BlackBerry section."
are you trying to do an widget application or a mds application? cos The MDS Runtime technology and its tooling is now End of Life.