New to Java

i know that this problem is posted all over the web, however none of the solutions seem to work for me. I am running jdk1.6.0_03 in eclipse. When I try to do an ant build on one of my projects, I receive about 6 errors, and the build fails.

Buildfile: C:\Program Files\eclipse\workspace\My Project\build.xml
check-properties:
deploy:
compile:
[javac] Compiling 6 source files to C:\Program Files\eclipse\workspace\My Project\examples-library\target\classes
[javac] C:\Program Files\eclipse\workspace\My Project\examples-library\src\java\bannerads\library\BannerService.java:11: package javax.servlet does not exist
[javac] import javax.servlet.ServletException;
[javac] ^
[javac] C:\Program Files\eclipse\workspace\My Project\examples-library\src\java\bannerads\library\BannerService.java:44: cannot find symbol
[javac] symbol : class ServletException
[javac] location: class bannerads.library.BannerService
[javac] throws ServletException, IOException
[javac] ^
[javac] C:\Program Files\eclipse\workspace\My Project\examples-library\src\java\bannerads\library\impl\XMLBannerSource.java:17: package javax.servlet does not exist
[javac] import javax.servlet.ServletContext;
[javac] ^
[javac] C:\Program Files\eclipse\workspace\My Project\examples-library\src\java\bannerads\library\BannerService.java:28: cannot access javax.servlet.ServletException
[javac] class file for javax.servlet.ServletException not found
[javac] public class BannerService extends AbstractService
[javac] ^
[javac] C:\Program Files\eclipse\workspace\My Project\examples-library\src\java\bannerads\library\impl\XMLBannerSource.java:83: cannot find symbol
[javac] symbol : class ServletContext
[javac] location: class bannerads.library.impl.XMLBannerSource
[javac] ServletContext servletContext =
[javac] ^
[javac] C:\Program Files\eclipse\workspace\My Project\examples-library\src\java\bannerads\library\impl\XMLBannerSource.java:84: cannot access javax.servlet.http.HttpServlet
[javac] class file for javax.servlet.http.HttpServlet not found
[javac] cycle.getRequestContext().getServlet().getServletContext();
[javac] ^
[javac] Note: C:\Program Files\eclipse\workspace\My Project\examples-library\src\java\bannerads\library\impl\XMLBannerSource.java uses unchecked or unsafe operations.
[javac] Note: Recompile with -Xlint:unchecked for details.
[javac] 6 errors

BUILD FAILED
C:\Program Files\eclipse\workspace\My Project\build.xml:23: The following error occurred while executing this line:
C:\Program Files\eclipse\workspace\My Project\examples-library\build.xml:40: Compile failed; see the compiler error output for details.

Total time: 3 seconds

Here are my environment variables:

my ANT_HOME variable is

C:\Program Files\apache-ant-1.7.0

my CLASSPATH variable is

.;C:\Program Files\apache-tomcat-6.0.14\lib\servlet-api.jar;

My JAVA_HOME variable is

C:\Program Files\Java\jdk1.6.0_03

and i added the following values to my PATH variable

%ANT_HOME%/bin;%JAVA_HOME%/bin;

Any help with this would be greatly appreciated, thank you! Also, I did try adding servlet-api.jar to my build path properties of the project in eclipse. Thanks!