My Account password is refused for Windows Sharing


Friend of the elves
With the previous version Mac OS 10.3, I had no problema sharing folders on my Mac with Windows.
My Mac could be accessed through Network places in Windows, in the workgroup "WORKGROUP", as all the machines in my LAN.
When I installed Tiger, I discovered that I had to "enable" the accounts that can use Windows Sharing.
In my Mac I have two accounts. However, I don't understand why it only lets me to enable one of them!!
I had no problem enabling my wife's account for windows sharing, but no way with mine. It keeps telling me that the password is wrong every time.
What could be happening with my account?

I've illustrated this post with some attached images from my System Preferences.
Thank you!!