Outlook 2002 – PST file won’t open

I had Outlook 2002 working with a PST file. It was 250 MB. I had to re-image my computer. Everything is back to normal now. I have copied my PST file back. I try to open it and it says that it is not a valid PST file.

Help? I’ve been told since that I should use import export. This has never been true in the past. File–>Open–>PST file has always worked just fine for me in OL2000. Never the less, I can’t import it either (same “not a valid PST file” message).