Is there a memory or size restricion for sending data using HTTP?

Rate upload using HTTP

200 days works, 230 days does not.

Seems like a memory or size issue. Where is a size parameter in HTTP

1. xmlHttp.send(ls_OTA_HotelRateAmountNotifRQ)

String ls_test2

ls_test2 = xmlhttp.responseText()

String ls_status_text

Long ll_status_code

ls_status_text = xmlhttp.StatusText

ll_status_code = xmlhttp.Status

//Messagebox("ls_status_text", ls_status_text)

//Messagebox("ll_status_code", ll_status_code)

//Messagebox("ls_test2", ls_test2)

IF ll_status_code = 200 AND ls_status_text = "OK" THEN

                IF  Pos(ls_test2, "<Success />", 1) > 0 THEN

                                Messagebox("InnLinK Rate Load", "Full year of rates loaded successfully")

                ELSE

                                Messagebox("NOT SUCCESSFUL", String(ll_status_code) + ": " + ls_status_text)

                END IF

END IF  

I get the message      NOT SUCCESSFUL   200: OK because the "<Success />" is not found and the reciving party has no record of what I am trying to send them.