i can run my program with ecplis not a porblem but i can using java

i am using eclipse and i program a simple aplication with JavaMail to send me an email. i can compile it and run it just fine using eclipse but when i go java sendip (send ip is the class name and my pwd is the same of the sendip.class's) i get Exception in thread "main" java.lang.NoClassDefFoundError: and it wont run...

i folowed the instruction in the read me of JavaMail to send the classpath to where i unziped it

here is my class path

CLASSPATH=.;.;C:\PROGRA~1\JMF21~1.1E\lib\sound.jar;C:\PROGRA~1\JMF21~1.1E\lib\jmf.jar;C:\PROGRA~1\JMF21~1.1E\lib;%systemroot%\java\classes;.;"C:\Documents and Settings\student\Desktop\Laptop\javamail-1_3_2-upd\javamail-1.3.2\mail.jar";;"C:\Documents and Settings\student\Desktop\Laptop\jaf-1_0_2-upd2\jaf-1.0.2\activation.jar";

and path is

Path=C:\WINNT\system32;C:\WINNT;C:\WINNT\System32\Wbem;C:\Program Files\Microsoft Visual Studio\Common\Tools\WinNT;C:\Program Files\Microsoft Visual Studio\Common\MSDev98\Bin;C:\Program Files\Microsoft Visual Studio\Common\Tools;C:\ProgramFiles\Microsoft Visual Studio\VC98\bin

any jugjestion would be greatly apreciated

[1147 byte] By [JeanMarca] at [2007-10-1 15:46:36]
# 1
The error tells you what can't be found. You need to add it to your classpath, apparently.
ChuckBinga at 2007-7-10 23:37:40 > top of Java-index,Developer Tools,Debugging and Profiling Tool APIs...
# 2
thanks for your sugjestions lol when i did set classpat i put " " on each end of the path of my external jar cause there was spaces in it. i guess i shouldn't have done that ty for your time :P
JeanMarca at 2007-7-10 23:37:40 > top of Java-index,Developer Tools,Debugging and Profiling Tool APIs...