TwentyTwelve Timeout Using Editor (header.php)

not sure what’s happening, but while using a child theme, i am trying to copy/paste the header.php from the parent and pasting it in the child. (i’m using the editor) and it keeps giving me a page cannot be displayed error. i can maybe paste about half of it and it will work.

i’ve talked to the my hosting company, that’s not what it is, because i was doing this stuff all in 2011 perfectly copying and pasting stuff… not sure if anyone has run into this or not, kinda frustrating as i wanted to use this as a base theme, but it’s all good, i’ll use 2011, unless someone knows the answer to this sooner…

thanks guys.