Failed Stress Test in testing process

I am using SYMBIAN SIGNED PRE-CERTIFICATION TOOL - EKA2 v.1.2.0 for testing
application for signing in 3rd edition but testing aborted with following errors in log file---

FAILED GEN-02 Stress Test.
OK Run tested app while sending rapid key events.

FAILED MEM-02 Low Storage Memory During Execution.
OK App can be run while storage mem is low & will not fill storage.
OK Close app before test, in case running already.
OK Running of app recording. Should not terminate unexpectedly.
OK App can be closed gracefully within 15 s timeout.

not run PHN-01 Service Interruption. (call, SMS, MMS, alarm, charger)
OK Application is launched.

FAIL Running of app. Should not terminate unexpectedly.

not run PHN-02 Unexpected Reboot

pls help me to clear these steps i ve cleared around 7 steps but in these cases i m not getting
any clue........