Problem with custom shared library

Hi,
I created a shared Library called libTree.so to be used with a program called Insert.
When doing it in a Mandrake 10 machine (2.6.3-7mkd, i686) , everything works fine
The problem occured when i copy all the files to a Fedora Core 4 machine (2.6.11-1.1369_FC4.stk16, i686) and try to run it. The error is:

Code:

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error while loading shared libraries: libTree.so: cannot open shared object file: No such file or directory

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Have tried to add the path to LD_LIBRARY_PATH and even copy the libTree.so to /usr/local/bin; but no help.

Does anyone know why it is ?

Thanks in advance.
Cheers.

Are you running ldconfig as root after copying the library over (to some place in LD_LIBRARY_PATH)?

What's ldconfig and how to check if i were running it or not ?

Thanks.

http://www.die.net/doc/linux/man/man8/ldconfig.8.html

You'd know whether or not you ran it or not, by whether or not you ran it or not. It sounds like you didn't.