Not Installing Help

Please i dont know what to to!!! Here is my log

   
Executing gradle command: cleanCache clean setupDecompWorkspace --refresh-dependencies
Microsoft Windows [Version 6.1.7601]
Copyright (c) 2009 Microsoft Corporation.  All rights reserved.
C:\Pylo\MCreator175>cd forge
C:\Pylo\MCreator175\forge>SET "JAVA_HOME=C:\Pylo\MCreator175\jdk64\"
C:\Pylo\MCreator175\forge>SET JAVA_EXE=%JAVA_HOME%\bin\java.exe
C:\Pylo\MCreator175\forge>SET PATH=%JAVA_HOME%\bin\;%PATH%
C:\Pylo\MCreator175\forge>gradlew -Dorg.gradle.jvmargs="-Xms625m -Xmx2048m" cleanCache clean setupDecompWorkspace --refresh-dependencies 
This mapping 'snapshot_20161220' was designed for MC 1.11! Use at your own peril.
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         ForgeGradle 2.2-SNAPSHOT-f0ba31b        
  https://github.com/MinecraftForge/ForgeGradle  
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               Powered by MCP unknown               
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         by: Searge, ProfMobius, Fesh0r,         
         R4wk, ZeuX, IngisKahn, bspkrs           
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:cleanCache FAILED
FAILURE: Build failed with an exception.
* What went wrong:
Execution failed for task ':cleanCache'.
> Unable to delete directory: C:\Users\Slimey\.gradle\caches\minecraft\assets\objects\2a
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
BUILD FAILED
Total time: 47.613 secs
C:\Pylo\MCreator175\forge>
Task completed with return code 0 in 48918 milliseconds