Thanks for help , I tried everything and finally I managed to login after did not enter any password ...

.Strange site is pool.gridcoin , no password reset , no e-mail , no support, nothing.
If anyone has problems logging into the pool, do the following steps (the first part is important):
Type in your username and password. Click Log Out.
Type in your Credentials. Click Log In.
Ill add a password reset and a support link.
Rob
PS This usually happens if the session expires while logged in.