I've tryed to set up an new event, with a seating chart.
The Test has 10x10 rows!
But when i set the Event online i can't choose a seat from the chart. I have just a dropdown field Seats numbered from 1 to 100.
The template I am using is the right one.
So please help me!

The problem could be probably in the attributes name. Go to eTicket administration / settings. There you can see the "Attribute Settings" table. Check the "Object Name" and "Seats Name". Then save it. Go to the ticket administration. Probably you'll see there some long list of attributes (seats). Delete it and save the ticket with correct values. Or you can delete the ticket and create new one. It should be easier.

If it'll not help, please, write me again.