[Oreka-devel] Fwd: Problems with Filter class to build OrekAudio

-- Hi, I'm traying to compile their solution, I build correctly 
OrekBase, but now to compile OrekAudio project I get the next errors 
relationship with Filter class

Error    73    error C2504: 'Filter' : clase base sin definir 
GsmFilters.h   OrkAudio
Error    74    error C2143: error de sintaxis : falta ';' delante de 
'__cdecl'    c:\GsmFilters.h   OrkAudio
Error    75    error C4430: falta el especificador de tipo; se presupone 
int. Nota: C++ no admite default-int  GsmFilters.h OrkAudio

I hope you can help me

Best regards