okay im new to this error.... its says

Excepetion in thread ''Thread-3'' java.lang.linkageError: version mismatch:jar version
is '22' , native libary version is '21'
at org.lwjgl.sys.<clinit><sys.java:103>
at org.lwjgl.opengl.display<clinit><display.java:128>
at org.com.mojang.minecraft.l.run<Unknow Source>
at org.java.lang.thread.run<Unknow Source>

dont say u didnt install minecraft.jar correctly i have done that and i got alll the files in the lib map

so yea.... what is the problem here:S