Ok...i have seem to forget where the c# is....second octave btw....i rember one though...but i don't think it is the best oen to use for this particulat piece...so if you could please tell me the locations of those...that woudl be solid....

If you mean right hand pinkey, it is on the lower pair of those four keys, closest to the finger holes.

This link is for a website for woodwind fingering, which may be useful.

http://www.wfg.woodwind.org/clarinet/