Failed to fulfill target org.apache.maven.plugins: maven-compiler-plugin: 2.0: compile

Question

I am working on Spring MVC [Google engine]. My project was built on 1.6 Java SDKs earlier, now I wanted to switch to Java SDK 1.7.

I made all the changes to upgrade to the JAVA 1.7 SDK.

I made changes to the pom.xml file [I commented on the old 1.6 SDK code]

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-compiler-plugin</artifactId>
  <version>2.0</version>
  <configuration>
<!--<executable>C:/Program Files/Java/jdk1.6.0/bin/javac</executable> -->
<!--<source>1.6</source> -->
<!--<target>1.6</target> -->
    <executable>C:/Program Files/Java/jdk1.7.0_45/bin/javac</executable>
    <source>1.7</source>
    <target>1.7</target>
  </configuration>
</plugin>

But when using the Maven install command, I get an exception like

Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0:compile

org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.0:compile (default-compile) on project: Compilation failure
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:213)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
    at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
    at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
    at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
    at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
    at org.apache.maven.cli.MavenCli.execute(MavenCli.java:534)
    at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
    at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
    at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
    at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
    at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.apache.maven.plugin.CompilationFailureException: Compilation failure
    at org.apache.maven.plugin.AbstractCompilerMojo.execute(AbstractCompilerMojo.java:429)
    at org.apache.maven.plugin.CompilerMojo.execute(CompilerMojo.java:110)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:107)
    at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:209)
    ... 19 more

Any help on this. My environment:

Apache Maven 3.0.2 (r1056850; 2011-01-09 06:28:10+0530) 
Java version: 1.7.0_45, vendor: Oracle Corporation 
Java home: C:\Program Files\Java\jdk1.7.0_45\jre 
Default locale: en_US, platform encoding: Cp1252 
OS name: "windows 7", version: "6.1", arch: "x86", family: "windows"