I had a simular problem like this but it was with mirc 6.03. Something like this could be trigger with other dlls.when this happened to me i shut down all dll's and loaded them 1 at a time to find the error. I do not recall the dll that caused the error but it just did not seem to wanna work with mdx. Another error i came across with mdx and other dll was using a steady 1 second repeating timer. If you ask me best way to find the error is stick the dialog using mdx in another mirc and see if same thing happens
