winsock Acknowledgment control needed

hello...

here is the problem with winsock.ocx:

Host A ---- GET message -----> Host B ------ GET Message ------> INTERNET

Host A <---- Response ----- Host B <------ Response ------ INTERNET


the problem is the deffrence between Download Speed And Upload Speed

Host B download with speed (100 KB) and Uploading To Host A with (50 KB) , and no controlling in traffic in winsock.ocx

i want to send Acknowledgment to INTERNET only if Host A Send me its Acknowledgment....