Hey Valeri,
Sorry about your troubles here. There are a few different things I’m curious about here, so for now, can you address each of these points:
1. Can you share an example Eventbrite Event ID that you are trying to import into your WordPress site?
2. If you upgrade your version of WordPress to the most recent – currently 4.2.1 – does this behavior improve at all?
3. What is your current hosting environment like? e.g. Do you have any Firewalls active? Are you on a shared public host or a private server?
We can keep going from there, but these three pieces of information will give us a good start on the troubleshooting further.
Thank you!