Apparently, there is a clash in a sort order, where both plugins are using the same value (as of July 2013).
Relavent thread here: https://theeventscalendar.com/support/forums/topic/a-conflict-with-download-manager-plugin/
I have not tested the mentioned work-around yet.
If this is NOT relevant to this issue, help in determining where the clash IS occurring would be appreciated, from both developers. I will follow up with the Events developer, but am only using the free version of The Events Manager – if someone here is using the Pro version, they might get better traction than a Free user…
Shaon – saying “Nothing to do with…” isn’t much help. Since both plugins were working together, and your update resulted in a failure of your plugin, I would have expected a little more interest in helping to determine why your plugin wasn’t working correctly… Just my 2 cents.