Can't build apk with Google play unity plugin

i have been attemping to use the Google play unity plugin but every time i try to build apki get this error

Error building Player: Win32Exception: ApplicationName='C:\Program Files (x86)\Java\jre7\bin\javac.exe', CommandLine='-bootclasspath "C:/adt-bundle-windows/sdk/platforms/android-19\android.jar" -d "F:\StarSider\Temp\StagingArea\bin\classes" -source 1.6 -target 1.6 -encoding ascii "com\google\android\gms\R.java" "com\google\example\games\basegameutils\R.java" "com\google\example\games\mainlibproj\R.java" "com\ThridCoreStudio\StarSider\R.java"', CurrentDirectory='F:\StarSider\Temp\StagingArea\gen'