I've gotten that G-Line message a few times too. I had to put in the code some three or four times before it went away; on top of that I had to use Internet Explorer because the page didn't even render correctly in Firefox.
The only advice I can give you is to try following the directions it gives you, or try connecting through a proxy. Beyond that there isn't anything that can really be done since this is all in IRC-Hispano's hands. I'm an op on the channel, but in order to move it off IRC-Hispano and to a different server we would need to get in contact with SPW's webmaster and get him (her?) to change the link here on the site. And I don't think any of the channel ops currently hanging around know how to get through to him/her. So we are pretty much stuck having the channel on IRC-Hispano until then.
Honestly I don't know why it was on a Spanish server to begin with, seeing as this is primarily an English website. However, we've already got the channel registered and everything, which was quite an ordeal. Perhaps the most effective course of action would be to bring the issue to IRC-Hispano's attention. And I'm sure we aren't the only ones getting blacklisted either. Their website (http://www.irc-hispano.es/
) would probably be the best place to try to get in touch with them... it looks like you will need to know Spanish though.