I enter username and password and am told it is invalid. Please help.

The Classifieds are separate from the forums and you need create an account there.
Click, the MY ACCOUNT tab at the top of the classifieds page and REGISTER.

Will give it a try. Thanks.

Now it is asking me for a valid web url even though I am signing up as an individual. I don't have a url and it is not a requirement according to the form. Need to get some stuff listed. Please help.

I don't remember it needing one.
Just leave the whole field blank or put in www.offshoreonly.com or something.

Tried leaving blank and put in a random URL. Still no luck.

Somebody else had the same url issue a while back. http://www.offshoreonly.com/forums/t...istration.html
They never posted to say if they got an account created or not.