[BUG] Combo Box doesn't works

When you put a "Combo Box" object, the message:
"An error ocurred, do you want to read the output file?"
Appears. The output file is bellow.

Code:

Buildfile: C:\Users\Leonardo\AppData\Local\Temp\AndACB9.tmp\build.xml [setup] Android SDK Tools Revision 12 [setup] Project Target: Android 2.1-update1 [setup] API level: 7 [setup] [setup] ------------------ [setup] Resolving library dependencies: [setup] No library dependencies. [setup] [setup] ------------------ [setup] [setup] [setup] Importing rules file: tools\ant\main_rules.xml -debug-obfuscation-check: -set-debug-mode: -compile-tested-if-test: -pre-build: -dirs: [echo] Creating output directories if needed... [mkdir] Created dir: C:\Users\Leonardo\AppData\Local\Temp\AndACB9.tmp\bin\classes -aidl: [echo] Compiling aidl files into Java classes... -renderscript: [echo] Compiling RenderScript files into Java classes and RenderScript bytecode... -resource-src: [echo] Generating R.java / Manifest.java from the resources... -pre-compile: compile: [javac] C:\Program Files\Android\android-sdk\tools\ant\main_rules.xml:384: warning: 'includeantruntime' was not set, defaulting to build.sysclasspath=last; set to false for repeatable builds [javac] Compiling 250 source files to C:\Users\Leonardo\AppData\Local\Temp\AndACB9.tmp\bin\classes [javac] C:\Users\Leonardo\AppData\Local\Temp\AndACB9.tmp\src\Extensions\CRunkccombo.java:22: cannot find symbol [javac] symbol : class AdaptableList [javac] location: class Extensions.CRunkccombo [javac] AdaptableList list; [javac] ^ [javac] C:\Users\Leonardo\AppData\Local\Temp\AndACB9.tmp\src\Extensions\CRunkccombo.java:113: cannot find symbol [javac] symbol : class AdaptableList [javac] location: class Extensions.CRunkccombo [javac] list = new AdaptableList (contents, android.R.layout.simple_spinner_item, [javac] ^ [javac] 2 errors BUILD FAILED C:\Program Files\Android\android-sdk\tools\ant\main_rules.xml:384: Compile failed; see the compiler error output for details. Total time: 3 seconds