[RESOLVED] Winsock: Inbound data missing

I am using a winsock control to get some data from a bespoke server. This works fine on my pc but on the production box the data gets... well not exacly truncated because it only gets the LAST 829 bytes from 2323 bytes

Any ideas what could cause this?

Thanks

Before any suggests it, I've also posted it here:
http://www.winsockvb.com/forums/showthread.php?t=3186