WDDX functions not working!!

Hi All, I have been running 4.3.4 on a Cobalt RaQ 4 for some months and have been using the WDDX functions with great effect. I have recently moved all our sites to a new server (Linux RedHat ES 3 running PHP 4.3.6) and found that the WDDX functions do not work! No errors just nothing happens. I checked the phpinfo and it clearly shows that wddx is enabled (as I would expect with the --enable-wddx configure option). I have found this to be the case for 4.3.6, 4.3.8 & 4.3.9. What's going on?? $wddx_string = wddx_deserialize($wddx_packet); This should generate an array but does not! Has anyone else found this? What version does it work on? Installing PHP 5 is not an option at the moment as all our classes would need re-writing to conform to the new standards. TIA - Phil. --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.769 / Virus Database: 516 - Release Date: 24/09/2004