Problems with exporting media through Adobe Media Encoder.

Hi there.  I am really confused now, writing this, cause my Premiere CS4 has worked pretty good the year I have had it.

So it has chosen a really bad timing to cause me problems.

I am working on a big musicvideo production. The whole video is now finished, and the labels and the artists are waiting for the video. But I’m facing big problems now. And I have tried everything to solve this, without succeeding.

·         When I export the video, the Adobe Media Encoder sometimes waits and waits and waits and waits, and nothing happens.
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·         When it does start, if goes to about 20%, and then it interrupts and give me "an unknown" error in the log-file:
Screen shot:

·         Sometimes when I open the project , it gives me the following message when importing the media files.
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·         The weird thing is that this only happens to the HD version. I have the same video in DV version, in a DV project, and it exports without any problem.

So PLEASE help me here, what shall I do??? I MUST finish this video!