My MP4 Captivate video will not upload to my LinkedIn Profile.....

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Anyone have any ideas as to why this is happening? All I get is a small text box telling me there was a problem uploading your file. 

I've uploded numerous Stoeyline MP4's before but now it will not load my Cpativate MP4.

[RodWard]

How big is the file?  Perhaps the issue is due to filesize restrictions at LinkedIn.