Package installation problem in linux

hi
all the friends
when i install any software packeg it will give me error.like that.
#yum install ree.55kd
#rhn problem.
#nothing do.


so please suges me what is problem there.

Yum does not has a feature to reinstall a software package, though, you can do is :

[root@mutant build]# rpm -e --justdb --nodeps [package name]
[root@mutant build]# yum install [package name]