Vungle sample code is not working for me?

I downloaded sample code from https://github.com/Vungle/coronaplugin-release/tree/master/samples.

replace app ID in main.lua but when I build for iOS Simulator, it shows blank screen. nothing…

Here is the log in console…

please help me…

9/3/13 8:39:46.958 PM lsd[10197]: updating identifier store
9/3/13 8:39:46.959 PM lsd[10197]: Attempting to store identifiers file
9/3/13 8:39:47.651 PM Finder[217]: PlotISImageRef 0x234502ac InContext 0x7ffe5ca3f960 in {10.000000,1.000000,16.000000,16.000000}, inAlign:0, inTransform:0, inFlags:0 failed. (err=-2582)
9/3/13 8:39:47.727 PM Finder[217]: PlotISImageRef 0x234502ac InContext 0x7ffe5ca3f960 in {10.000000,1.000000,16.000000,16.000000}, inAlign:0, inTransform:0, inFlags:0 failed. (err=-2582)
 

edit: never mind. work now, just few more minutes later… I had to press home button and relaunch the sample app… thanks…