OK Neme, which client crashes? I'm assuming the DT client is going down first. Since LT will report unfriendlies ... not sure what you're using Spies for atm. Try this before you go through the fuss and bother of a reformat: Using control panel, uninstall Spies completely - including checking the register for any key entries there. Make sure it's directory is also deleted (if you have any personalized things there, it will remain since they were not installed at the outset). Then see if you can log both clients in as usual ... totally without Spies. You said this worked before, it should work again. Trust me, Dual is NOT the issue here.
If that works, do a fresh download of Spies. Reinstall it. NOW - ONLY have it active in the client you are running on DT. Before you log into MT, DISABLE it on the Denagent window. See if you can get both clients up that way. Also, try disabling the "report unfriendlies" feature in LT on DT and let Spies handle that stuff.
Let me know how that works - you know how to reach me on MT
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