Finally I am come up with the answer by following these steps:
I created the new AVD by deleting the existing AVD.
Then push the apk file by:
windows->Open Perspective->DDMS
.Finally we need to install these apk with the help of command prompt.place your apk file in
android->sdk->platform-tools
adb install filename.apk
command used to install the apk file.Now,Apk file would be stored in sdcard.That apk file would be installed successfully by command prompt.