You know how some IB automated traders use Excel DDE to get data and even implement systems, through IB's TWS API? Well, all of a sudden today (after months working fine) it stopped working and instead of receiving data as usual, excel just freezes (in other words it hangs, it stalls...) and I get no data, but I have to terminate excel and start all over again but no avail. I can't understand what the cause might be. Maybe something else I installed. I tried reinstalling excel, tws, all api's versions but it still doesn't work. It happened before and I solved it with system restore, but some registry program deleted most of my restore versions so I can't do that. Any suggestions?