call_user_function/wddx_serialize_vars Question

I'm using the code below to use call_user_function to attempt to make a wddx packet. What I'm getting is the following wddx packet: <wddxPacket version='1.0'><header/><data><struct></struct></data></wddxPacket> Obviously I'm passing something incorrectly to call_user_function, but since this is my first time using call_user_function I'm not sure what. Note that I've tested the params array against IS_ARRAY and it passes. zend_print_pval_r() also shows the right data within the array. Any pointers on what I've screwed up here? -----------------8<----------------------------- /* Excuse the debugging and extra code */ char *spname = NULL; char *dbname = NULL; char *func_name = "wddx_serialize_vars"; int argc = ZEND_NUM_ARGS(); int spname_len; int dbname_len; int i; int cnt; zval *params; zval *function_name; zval *params_wddx = NULL; zval *params_array; MAKE_STD_ZVAL(function_name); ZVAL_STRING(function_name, func_name, 1); MAKE_STD_ZVAL(params_array); array_init(params_array); if (zend_parse_parameters(argc TSRMLS_CC, "sas", &spname, &spname_len, &params, &dbname, &dbname_len) == FAILURE) { return; } if (Z_TYPE_P(params) == IS_ARRAY) { zend_printf("\n%s\n", "params is an array"); } else { zend_printf("\n%s\n", "params is not an array"); } add_index_zval(params_array, 0, params); if (FAILURE == call_user_function(CG(function_table), NULL, function_name, &params_wddx, 1, &params_array TSRMLS_CC)) { zend_printf("%s\n", *function_name); zend_error(E_ERROR, "Function call failed"); } zend_printf("\n%s\n", params_wddx); ----------------->8----------------------------- --- Jeraimee