Import Not Working Correctly

Hi All,

I am trying to upload my CSV file using the tool @ http://www.opencart.com/index.php?route ... sion_id=17

It was working perfectly fine to start with, but now the sheet is very large and it does not import all the data. The import complete's correctly but there are lots of data missing, mainly in the Options TAB. Which of course is very important for my site.

Has anyone had any issues with import large CSV files? Can anyone help? Willing to pay if need be as this is Urgent!

OC = Version 1.5.6.1

Thanks