If an agent is activating when a DCC is activating then you must have Agents enabled to do so...
ALT+O > Sounds > Agents
Under 'Enable agents for:' uncheck 'Other events', and the other two boxes if they're checked. Alternatively, if you want them enabled for other events except for DCC Sends/Gets, then click on the [Events..] button and then uncheck the box 'Sends/Gets'.
You could unload any Agents you have loaded too.
Regards,
