How can I get into AdminCP so I can revert my style to prevent parse errors?

[محروم.كوم]

I just upgraded my server. My forum was running perfect on the old server. I did a backup, moved the files and database over, and now I'm having all kinds of parse errors all throughout the site:
Code:
Parse error: syntax error, unexpected '=' in /public_html/global.php(834) : eval()'d code on line 33
I am unable to login to AdminCP because I keep getting the following error:

Code:
Unable to add cookies, header already sent.
I disabled all plugins by adding the line to my config.php but that did not work. I feel like the template needs to be rebuilt - revert all templates to a default vBulletin style, however I have no way of doing that since I cannot login to AdminCP.

How can I get into my AdminCP so I can troubleshoot the style? __DEFINE_LIKE_SHARE__