OpenWRT and perl - compilation problem?

Hello,
I am currently running openWrt on wrt54gl router. I have installed full perl (5.8), and I can run scripts that do no require any modules (other than the base ones, for example, printing "hello world" works just fine). However, when i try to run scripts with "use <module>", I get error like this,

Can't load '/usr/lib/perl/5.8/auto/IO/IO.so' for module IO: Unable to resolve symbol at /usr/lib/perl/5.8/XSLoader.pm line 83.
at /usr/lib/perl/5.8/IO.pm line 9
Compilation failed in require at /usr/lib/perl/5.8/IO/Handle.pm line 256.
BEGIN failed--compilation aborted at /usr/lib/perl/5.8.0/IO/Handle.pm line 256.
Compilation failed in require at /usr/lib/perl/5.8.0/IO/Socket.pm line 11.
BEGIN failed--compilation aborted at /usr/lib/perl/5.8.0/IO/Socket.pm line 11.
Compilation failed in require.
BEGIN failed--compilation aborted.

Any one know how to fix it?? thanks

The installed modules are not compatible with the version of perl being executed. Notice how some paths say 5.8, and some say 5.8.0? That's the dead giveaway. To get started debugging this, find the exact perl in your shebang line and execute it with -v to get the EXACT version. E.g.
/usr/bin/perl -v