Problem with Zend Optimizer

I just upgraded my PHP to version 4.6 and add the version of Zend Optimizer that is supposed to be compatible with this version of php. But I can not get it to work it seams it can not find the file libm.so.5 on the server. I know for a fact it is on the server. This is the error I get Failed loading /usr/local/include/php/Zend/zendoptimizer.so: libm.so.5: cannot open shared object file: No such file or directory I also ran the ldd Command and I get this ldd /usr/local/include/php/Zend/zendoptimizer.so /lib/libNoVersion.so.1 => /lib/libNoVersion.so.1 (0x40033000) libm.so.5 => not found libdl.so.1 => /lib/libdl.so.1 (0x40038000) libc.so.6 => /lib/libc.so.6 (0x4003b000) /lib/ld-linux.so.2 => /lib/ld-linux.so.2 (0x80000000) What can I do to get this working Best regards, Richard mailto:rkurth@pacifier.com