Easy nested Excel "if" statement: Who can solve it?

I can't seem to get the formula to work past the first 2 instances of the "if" statement. i've used 3 different ways to write this formula, and they all fail at the same spot. Here it is...

1) =IF(AND(Windows!C33=Info!N21,Windows!C34="No"),CONCATENATE(Windows!C33," Jamb Fin"),IF(AND(Windows!C33=Info!N21,Windows!C34="Yes"),"Universal Fin",IF(AND(Windows!C33=Info!N22,C34="No"),"InsulVIEW Jamb Fin",IF(AND(Windows!C33=Info!N22,C34="Yes"),"InsulVIEW Jamb Fin",IF(Windows!C33=Info!N23, "Universal Jamb Fin")))))

2) =IF(C34="No", IF(C33=Info!N21, CONCATENATE(C33, " Jamb Fin"), IF(C33=Info!N22, "InsulVIEW Jamb Fin", IF(C33=Info!N23, "Universal Jamb Fin"))),IF(C34="Yes", IF(C33=Info!N21, "Universal Jamb Fin", IF(C33=Info!N22, "InsulVIEW Jamb Fin", IF(C33=Info!N23, "Universal Jamb Fin")))))

3) =IF(AND(INDEX(Panels_1_1_4,MATCH(Windows!C33,Panels_1_1_4,0)),Windows!C34="Yes"),"Universal Jamb Fin", IF(AND(INDEX(Panels_1_1_4,MATCH(Windows!C33,Panels_1_1_4,0)),Windows!C34="No"), CONCATENATE(Windows!C33," Jamb Fin"), IF(INDEX(IWP_Panels, MATCH(Windows!C33, IWP_Panels,0)), "InsulVIEW Jamb Fin", IF(INDEX(Other_Panels, MATCH(Windows!C33, IWP_Panels,0)), CONCATENATE(Windows!C33, " Jamb Fin")))))


this formula is basically a filter. the spreadsheet is basically an order form for windows, and i'm filtering out wall panel types for the correct jamb fin. i think the problem lays in each "if" statement. each "if" statement compares the "Windows!C33" cell to a different range each time.