Fcp won't export audio in sync, fcp won't export audio in sync

Hs anyone any experience with FCP not exporting audio in sync even though the audion and video is in sync on your timeline prior to export, someone suggested that if you have independenytly recorded audio at 44.1KHZ instead of 48K this can cause issues, tried resampling but doesnt sem to make a difference any help would be appreciated

So guys here's how it all turned out. As I couldn't re-record the original source audio wave files, I resorted to opening up the original source wave files which were 44.1k  and resample them by opening them in soundtrack pro, process tab, then select resample, this then presents a drop down tab with a range of resampling options, in this case I selected 48k which is what my video is set to.
Surprisingly quickly the source files were re-encoded ( these were around 1 and 1/2 hour each running time)
Then reopened FCP and without having to Re-edit the timeline just offlined the orginal 44.1k files and replaced them by reconnecting media and pointing to new resampled 48k files.
They dropped back in perfectly and on export video and audio were in perfect sync.
Lessons learned - always record the audio which was on a separate field recorder at 48k. - point well made Goldfish
Secondly - thanks to everyone for your helps and hints
Thirdly - in learning we have no failures, we just fall forwards
Best regards,

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    --------------------------------------------------------------------------------
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