sometimes when you use a lager yeast it takes a while to get going,try tightening your l lid up a bit more ,as batz said check to see if you have a bit of a ring above the wert level.after it kicks in you really should have that temp down to about 10/12 degrees.try putting it in the laundry sink with about 10 inches of waterin it and adda frozen 2 litre bottle of water into the the sink,change this every day with a new one and you should be okay,it will probably take about 14 days to finnish,dont drop the temp though until the yeast has started to work then bring it down
fergi