The system doesn't currently allow you to map from Dukascopy symbol name to MT4 symbol name. This means that micro accounts (for eg) do not output EURUSDm as required by MT4.
Fix will be released shortly.
[TICKLITE-31] MT4: Support for micro accounts
Re: [TICKLITE-31] MT4: Support for micro accounts
This has now been addressed in v0.5b.