[roundest]

Try this:

I had the Eurobet Poker page open in my browser. I tried to login to the client using the ht1234567 username or whatever. A page opened up in my browser with a little form suggesting that I use my old screenname and my old screenname was in a box. I clicked "submit" and then went back to the client and tried to login again with my old ht1234567 username and it worked.

Just in case you forgot, your username and screenname are two different things at Euro.