howto log into a site when router blocks it

How do you log into a site when the administrator blocked the website through the router. I do not have access to the router because I dont know the password. I know I can use www.freeinternetproxy.com to view a site blocked by a router, but I cant log in. I was wondering if there was a way around it so I could log in. (To be specific, Im talking about myspace)

See here:
http://www.hardforum.com/showthread.php?t=935081

Just go to the sysadmin and explain why you need access to myspace. I'm sure they'll get right on it.