Seems you are using Birt’s TDS. If you have the slippage feature enabled, I assume that’s what’s causing this?
Also refer to the MT4 manual regarding Error 138: http://docs.mql4.com/trading/OrderSend
Make sure your EA is refreshing prices before placing the order with RefreshRates().
Tickstory does not sell the TDS and nor does it charge for ‘Tickstory Lite’. Please check what product you have purchased. The only person we know of that vends a product called ‘TDS’ is Birt: http://www.eareview.net.