As I indicated in response to your PM, try moving the PST file to the other computer before importing it, to eliminate possible share/security permission problems.
If this doesn't work check if you can import the file to the outlook on your computer, if not then the file may be corrupt and you might want to concider using the "inbox repair tool" scanpst.exe though do create a backup of the file before hand as this tool just fixes the file header then discards information it doesn't recognise.
Intel core I7 920
6GB OCZ platinum 1600
Samsung 1TB F1 Spinpoint
Samsung SM2443BW 24"