tbrides - ftp your file to the /temp folder in Admin and then enter the file name in the : Import from Temp Dir (temp/) box in EP main page.

bifficus - Not an expert at PHP but it doesn't have a very big memory so I would suggest your file is too big,How many/ how big is your file/ qty of products? I would only up load max. 500 products at a time, maybe a few less for good measures.