교수님!!

교수님!
공지사항대로 다 따라해서 컴파일까지 정상완료 됐다고 나오는데
막상 form_jsp 실행하면

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Unable to compile class for JSP





An error occurred at line: -1 in the jsp file: null





Generated servlet error:


    [javac] Since fork is true, ignoring compiler setting.


    [javac] Compiling 1 source file


    [javac] Since fork is true, ignoring compiler setting.


    [javac] C:JAVATomcat4.1workStandalonelocalhostjspbookexperienceguestbook_control_jsp.java:44: package gb1 does not exist


    [javac]       gb1.GuestBean gb = null;


    [javac]          ^


    [javac] C:JAVATomcat4.1workStandalonelocalhostjspbookexperienceguestbook_control_jsp.java:46: package gb1 does not exist


    [javac]         gb = (gb1.GuestBean) pageContext.getAttribute("gb", PageContext.PAGE_SCOPE);


    [javac]                  ^


    [javac] C:JAVATomcat4.1workStandalonelocalhostjspbookexperienceguestbook_control_jsp.java:49: package gb1 does not exist


    [javac]             gb = (gb1.GuestBean) java.beans.Beans.instantiate(this.getClass().getClassLoader(), "gb1.GuestBean");


    [javac]                      ^






라고 에러가 나는데 뭐가 잘못된 건가요?? 
C:JAVATomcat4.1workStandalonelocalhostjspbookexperience 밑에도 똑같이 클래스가 생겨야 된다는 말인가요?
(c 밑에 jspbook폴더에는 생겼는데 톰캣 밑의 폴더에는 안 생겼더라구요~)