Error in compiling the ejb source files......

hi all,
it makes me to go mad...
i have got error sometimes while compiling the ejb java source files and sometimes not...
i would appreciate anybody for helping me in this problem
i am using sun application server 8.1 and javac compiler
i have got the following error
D:\>path=%path%;c:\j2sdk1.4.2_12\bin;
D:\>set classpath=%classpath%;d:\Sun\AppServer\lib\j2ee.jar;
D:\>javac d:\Librarys\Library.java
D:\>javac d:\Librarys\LibraryBean.java
D:\>javac d:\Librarys\LibraryHome.java
d:\Librarys\LibraryHome.java:8: cannot resolve symbol
symbol : class Library
location: interface Librarys.LibraryHome
public Library create(String id, String name, String address, String phoneNo
) throws RemoteException, CreateException;
^
d:\Librarys\LibraryHome.java:9: cannot resolve symbol
symbol : class Library
location: interface Librarys.LibraryHome
public Library findByPrimaryKey(String id) throws FinderException, RemoteExc
eption;
^
2 errors
D:\>

hi,
thanks for ur reply
i haven't tried the thing given by you
i will reply u soon after trying out that
but when i compiled *.java instead of compiling individual files
everything go fine....

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