OSW (opensimworld) here is not related to any grid to log in. This is sometimes misunderstood. If you have problems to login at your grid, its always the best idea to contact the grid owner... to maybe reset a PW or so.
I understand, if the problem is on OSG, I would suggest to ask for support at the chat channel of OSG or send a support mail using the adress on the site, (for better results check the chat channel at the evening when Dan Banner is on line)