B4J Question Port library from b4a to b4j

I made an small library to encrypt some data in 3des and base64 with password.
now I try to port to b4j everything works on the compiler bur en I try to run on b4j.
sais this. but in b4a works nice.

java.lang.NoClassDefFoundError: org/apache/commons/codec/binary/Base64

was build with simple library compiler.

Victor