[10053] Software caused connection abort

I get this error ever time I finish an xdcc send. The program locks up while the anti-virus software checks for viruses when the xdcc is complete..so it seems. Right after the anti-virus finishes the scan (approx 5-8mins), the program comes back alive but I have been kicked out from the network (disconnected). When I take a look at the new xdcc file on my computer, it is not complete either, and every time I try to retreive the file again to complete it, the same crash happens to me. XPsp2, I am using mIRC 6.12. Maybe I should try an older version, if it is still available. Love the program, pleeeeease help me out ppl, kthx!