Install failed container error

Install failed container error

Application 1: My project almost 90 percentage finished, at this stage I
was trying to create widget for my app when I was running after creating
and adding the widget successfully to the project the error INSTALL FAILED
CONTAINER ERROR occurs. Ok now I just tried to delete the .asec (i.e
/mnt/secure/asec/example.asec) which is not working for me. I also tried
to set the installation location android:installLocation="auto" which is
not also working. Finally I decided to delete my Widget (Class, layout and
everything related with the widget) and then tried still the error INSTALL
FAILED CONTAINER ERROR occurs
Application 2: And One more problem with my one more application which is
also at 90 percentage of finishing state, it shows
08-18 23:03:38.928: E/AndroidRuntime(3235): FATAL EXCEPTION: main
08-18 23:03:38.928: E/AndroidRuntime(3235):
java.lang.NoClassDefFoundError:
com.jeremyfeinstein.slidingmenu.lib.SlidingMenu
08-18 23:03:38.928: E/AndroidRuntime(3235): at
in.blogspot.pcnlap.skillgun3.MainActivity.onCreate(MainActivity.java:31)
This is a Jfeinstein10/SlidingMenu I ran this second application more than
100 times for testing purpose at that time it did'nt showed any error