If you're able to select Blackberry as a platform it means you're using the old standalone ATE. The old standalone ATE doesn't support iOS screens.
Try the same tests using the Eclipse Integrated ATE. Setup steps are below -
http://help.sap.com/saphelp_smp3010sdk/helpdata/en/42/7f2b0f12ae4242beca0836080fa130/content.htm
Cheers,
Stephen