Strangely enough I was chatting to Portmac regarding this this morning. I have the UK release of Purple Haze, and could only get it to work by copying it with BW4 and turning off autoplay and enhance weak sectors. As Kamikazee states, the first disc of FA is protected, but you have to use the play disc from VC to actually play it, bizarre.
I have a slightly different version of Securom though, FA is 5.00.03.0005 and VC is 5.00.03.0205 I'll have to ask Portmac why their is different versions on the two discs, as its all based around the .sys file in the system temp folder (from what I understand, but its a basic understanding)
The version number of the protection increases after installation of FA (updates the game to v1.50) and that may be where BW5 is failing?