FCP can not read my PC P2 content

I got my new IMAC recently and I want to inport mxf files from my PC into MAC but when I open them in FCP all the clips are playing only 30 sec.
On my PC I was using Premiere CS and everything was normal,is there a problem with file sistem NTFS,FAT32?
 
Yes,I transfered them from my P2 cards trough PCMCI into my laptop. After that I transfered them to my IMAC trough network.
 
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