Associative arrays and PEAR SOAP

Hi Guys, I am running PHP 4.4.6 and using PEAR::SOAP package to build a WebService. In the WSDL, I have defined the data types as complex for some of the parameters in the function call. Those complex types are in turn defined separately describing each element of the complex type. It appears that the SOAP server converts the associative arrays to a normal integer index array so I am not able to see any of the element names as the array keys. And it does the same thing when returning values. Is there a way to alleviate that? Thanks, -Punit.