When you sign up for plentyoffish, they require you to create a password. Sometimes you will be redirected to a screen where it says your password is not strong enough. This usually means 1 of 2 things. Either your password really is not strong enough, in which case you need to reenter a new plentyoffish password associated with your account. The other thing this could mean is that your ip address or something you are doing has triggered a temporary block. If you reenter a new pof password and still keep getting the error message that your password is not strong enough, here is what you need to do.
1. Get a new IP Address, this can be done by resetting your DSL modem or Cable modem. Usually unplugging it and plugging it back in will issue you a new ip. This really depends on your service.
2. After your router reboots, then clean out the cookies in your browser. If you do not know how to remove cookies/LSOs download a program called cccleaner, this will do it for you and it is free.
After you follow these 3 steps, if done right you should be able to create a new pof account.