sounds like you have early symptoms of the usual fridge cooling issues - what happens is the panel in the lower part of the fridge get to cold - freezes the water bottle and stops water from coming out, you will probaly find fridge temp will start to go up and down and you may get a noise from fridge which stops when you open door ..
you should check this guy out on youtube re samsung fridge freezer problems .. he is an authorised samsung agent and can also supply spares to cure fault ..
copy and paste this link into your web browzwer
http://www.youtube.com/watch?v=RP9XLji-gdw
or just go to youtube and type in samsung fridge freezer problems - im sure you will find him
calum
December 2010