silver solder does nothing except help against silver depletion when soldering silver leads. Going by my 2M 6 week long military solder course (ISO 9001 specs for civi) the solder you want is 63/47 its called eutectic this link explains it http://en.wikipedia.org/wiki/Eutectic_point
it will have a low solder melt temp and goes straight from a liquid to a solid with no "gel" in between giving the best solder joint.
Also NEVER EVER use acid core flux/solder on electronics!!!!! use RMA (rosin mildly activated) is only corrosive at solder melt temperatures.
and clean all flux up with Q-tip and isopropel try not to use to high of a temp, but also dont forget too low will be just as damaging. with a small area like on surface mount components a very small amount of solder is needed an d ah eat around 400-410 i would think.
good luck and be carefull