Have you really got 3 lines in the Manifest? There should be 4, the last line being empty.
I presume you have read the Java Tutorials section, where it says you must end with a line terminator character. Shouldn't you have all those jars in the classpath part of the Manifest file, rather than listing them at the command line?
Another problem here is that you have space characters in the classpath. That's why the JVM thought "D:\alerter-jar\commons-codec.jar" was the name of the class you were trying to execute. But since you specify all the jar files in the manifest, there's no need to have a classpath here at all.