Sometimes when a file is to big (~50 mb or larger) mysql doesn't like it.
You could easily solve this splitting your huge SQL file.
A very userfull tool to do this is this programm (windows only, sorry!)
SQL Dump File Splitter
When the files are spitted it has a small readme that explains which file to import first.
Remember, the order is VERY important!
You can also use "Big Dump" trough your FTP
http://www.ozerov.de/bigdump/
With this tool mac and window users can Import big SQL databases
