jar - NoClassDefFoundError when run Java ME project which, use Bouncy Castle Library -

i wanna use decode base64 function in java me project so, add bcprov-jdk15on-149.jar project.(bouncy castle library)

by adding hardware jar files, got error: java.lang.noclassdeffounderror: org/bouncycastle/util/encoders/base64

then, try adding application jar files, got error; project package got red cross , cannot run project.

i'm not sure did wrong, guy have suggestion?

(i use eclipse java me nokia sdk 2.0, jre1.7u17 , jdk1.7u17)