Paul, thank you for the help. I tried CQ WW CW, and it was OK at least for 10 or 15 QSOs. I deleted mi ALL file, then re-entered all QSOs in OFF mode, turned to ON, and it seems all OK now. I didn't made these tests during the contest... I am happy to see that SD is OK, it was my setting. 73 from Rik IZ2EJU