Error on launch of Requiem

[HeD]

Hi guys,

Couldn't find if this had already been asked/answered.

I have both BP and Requiem from Gamersgate.com and although BP worked fine first time, when I launch Requiem I get an error message stating 'The application could not be launched because SDL.dll was not found. Reinstalling the application may resolve this.' I have tried reinstalling and also patching Requiem to no avail. Any ideas?