I was on approach into Chambery Aix- Les bains (LFLB) in a 738. Everything looked fine I was avoiding all the terrain, it was when I engaged the APPR it all started to go wrong. I know Chambery has a steeper than usual glideslope at 4.46° so I took this into account. I was wondering wether APPR can only be used on approaches with a normal glideslope angle. Can someone please clarify.