Release hold is not working

Iam using OE_ORDER_PUB.PROCESS_ORDER  API to apply and release the hold for the customer .Apply hold is working but release hold is not working although API is passing success value.Iam pasting sample code.Can anyone please advice?.

v_action_request_tbl (1) := oe_order_pub.g_miss_request_rec;v_action_request_tbl (1).request_type := OE_GLOBALS.G_RELEASE_HOLD;  v_action_request_tbl (1).param1 := 1115; -- hold_id --(HOLD_ID from OE_HOLD_DEFINITIONS)v_action_request_tbl (1).param2 := 'C'; -- indicator that it is an order hold 'C' Means customer hold 'S' means ship_To or BIll_Tov_action_request_tbl (1).param3 := 8906; -- Cust account idv_action_request_tbl (1).param4 := 'Auto released by MD program';v_action_request_tbl (1).param5 := 'Testing';