Thanks to all of you for your answers. I have reinstall DX4WIN twice already but no luck.
Maybe if I install the drive manually? Which file should I modify? I found this reference in the DX4WIN help file. ---------- Port Driver The installation script installs a port access driver to support CW keying using a printer port and the generation of the CW side tone: for Win/95/98: Windows\System\Vichw11.vxd for Win/NT/2000: WinNT\System32\Divers\Vichw11.sys ---------- Thanks for your help. Ramón, XE1KK
