So I was running in to the following problem:
**Warning** The linkage identifier ‘RewindBtn’ was already assigned to the symbol ‘FLVPlayer_assets/Buttons/Rewind’, and cannot be assigned to the symbol ‘FLVPlayer_assets/Buttons/Rewind’, since linkage identifiers must be unique.
But in reallity I only had 1 button called Rewind with the Link ID of RewindBtn and nothing else. I even created a blank FLA and pasted the simbol by itself in the blank FLA but I still were getting the same warning.
Well after doing a search online and trinkering with flash I figured out that originally I had created the Symbol as button and then transformed the Button to a MovieClip within the Library but never changed the Button to a MovieClip within the Properties panel in Flash.
Go figure! the warning has gone away.