help! memcached can't find libevent-1.1a.so.1. what's wrong?

[cheng wavar]

I have installed libevent and memcached in my computer(OS: CentOS 4.3). But 
when I want to start up memcached. It reported this error:

[root at localhost bin]# ./memcached -d -m 256 -l 127.0.0.1 -p 11211
./memcached: error while loading shared libraries: libevent-1.1a.so.1: 
cannot open shared object file: No such file or directory

Actually, I can find the file "libevent-1.1a.so.1" in the directory 
"/usr/local/lib":
[root at localhost lib]# ls
libevent-1.1a.so.1  libevent-1.1a.so.1.0.2  libevent.a  libevent.la  
libevent.so
[root at localhost lib]# pwd
/usr/local/lib

What's wrong? Why memcached can't find "libevent-1.1a.so.1"?

I hope I can recieve your help as soon as possible. Thank you very much!

Sincere yours
Wavar Cheng

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