Handling a post operation

Hi All, I have a windows application written in Borland C++Builder 5 which uses the Indy components for internet connectivity. I am using there HTTP component to do some get and post operations. All these operations work except for the multipart/form-data post, I send 3 variables down, none of which are set in the script. I have tried to use $varname as well as $_POST['varname'] and $HTTP_POST_RAW_VARS. None of these have any data. I have examined a tcpdump of the bad one and good one, not much different (nothing that matters as far as I can tell). I am using apache 2 and php 4.2.2. The same application worked correctly when I was using apache 1.3 and php 4.0.x. Can someone please point me in the correct direction, is their a php.ini setting that changed between the two versions? Thanks for your help Glenn MacGregor