It understands it because you have written the word 'attached file' in the text.
It doesn't understand what you have written. It just sees 'attached' and assumes that you have to attach a file. Nothing complicated. :no::P:no:
This is a known feature. It was earlier a labs feature, but I guess...
Short answer. No. :no: Norton PartitionMagic is not updated anymore and will not work on Win7 x64
Try out the partition managers from EASEUS and Acronis instead. :)